0001437749-25-033623 | 10-Q | XBRL Viewer

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or group, in deciding how to allocate resources and in assessing performance.

The Company’s chief operating decision maker (“CODM”), the Chief Executive Officer, reviews discrete financial information including total revenues, gross profit, and net income (loss) presented on a consolidated basis for purposes of regularly making operating decisions about allocation of resources and financial performance assessment. Further, the CODM reviews and utilizes functional expenses (costs of revenues, research and development, and selling, general and administrative) at the consolidated level to manage the Company’s operations. Other segment items included in the condensed consolidated net income (loss) are amortization of acquired intangible assets, interest expense, interest income and other, net and income tax expense, which are reflected in the condensed consolidated statements of operations and comprehensive income. Accordingly, the Company considers itself as one operating and reporting segment because it does not distinguish between markets, specifically the provision of services for differentiated data and analytics solutions to the semiconductor and electronics industries.

The following table presents segment total revenues, costs of revenues, gross profit, income from operations, and net income (loss) for the periods presented (in thousands):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*			*2024*
Total revenues	$	57,115	$	46,409	$	156,621		$	129,380
Costs of revenues	$	15,840	$	12,484	$	43,681		$	38,243
Gross profit	$	41,275	$	33,925	$	112,940		$	91,137
Income from operations	$	4,827	$	2,119	$	2,389		$	423
Net income (loss)	$	1,294	$	2,206	$	(592	)	$	3,518

Revenues from an individual customer that are approximately 10% or more of the Company’s consolidated total revenues were as follows:

	*Three Months Ended September 30,*						*Nine Months Ended September 30,*
Customer	*2025*			*2024*			*2025*			*2024*
A		38	%		19	%		24	%		21	%
B		12	%		*	%		14	%		12	%
C		*	%		*	%		11	%		*	%
D		*	%		13	%		*	%		*	%

* represents less than 10%

Gross accounts receivable balances (including amounts that are unbilled) from individual customers that are approximately 10% or more of the Company’s gross accounts receivable balance were as follows:

	*September 30,*			*December 31,*
Customer	*2025*			*2024*
A		35	%		21	%
B		*	%		13	%
C		26	%		11	%
E		*	%		12	%

* represents less than 10%

Revenues from customers by geographic area based on the location of the customers’ work sites were as follows (amounts in thousands):

	*Three Months Ended September 30,*										*Nine Months Ended September 30,*
	*2025*					*2024*					*2025*					*2024*
			*Percentage*					*Percentage*					*Percentage*					*Percentage*
	*Revenues*		*of Revenues*			*Revenues*		*of Revenues*			*Revenues*		*of Revenues*			*Revenues*		*of Revenues*
United States	$	30,143		53	%	$	21,065		45	%	$	68,325		43	%	$	58,021		45	%
Japan		10,091		18			6,275		14			31,131		20			25,495		20
China		5,842		10			5,673		12			26,075		17			17,526		14
Taiwan		1,238		2			6,273		14			4,235		3			8,107		6
Rest of the world		9,801		17			7,123		15			26,855		17			20,231		15
Total revenues	$	57,115		100	%	$	46,409		100	%	$	156,621		100	%	$	129,380		100	%

Long-lived assets, net by geographic area were as follows (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
United States (1)	$	85,110	$	58,782
Rest of the world		2,917		1,461
Total long-lived assets, net	$	88,027	$	60,243

(1) Includes assets deployed at customer sites which could be outside the U.S.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
ASSETS
Cash and cash equivalents	$ 35,880	$ 90,594
Short-term investments	0	24,291
Accounts receivable, net of allowance for credit losses	74,949	73,649
Prepaid expenses and other current assets	35,292	17,445
Total current assets	146,121	205,979
Property and equipment, net	71,921	48,465
Operating lease right-of-use assets, net	5,160	4,029
Goodwill	96,780	14,953
Intangible assets, net	54,246	12,307
Deferred tax assets, net	203	43
Other non-current assets	31,968	29,513
Total assets	406,399	315,289
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	14,653	8,255
Accrued compensation and related benefits	17,311	16,855
Accrued and other current liabilities	8,661	8,752
Operating lease liabilities – current portion	1,970	1,675
Deferred revenues – current portion	21,247	25,005
Current portion of long-term debt, net	2,238	0
Total current liabilities	66,080	60,542
Long-term income taxes	3,301	2,915
Non-current portion of operating lease liabilities	4,256	3,504
Long-term debt, net	65,320	0
Other non-current liabilities	(3,060)	(2,291)
Total liabilities	142,017	69,252
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.00015 par value, 5,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.00015 par value, 70,000 shares authorized; shares issued 51,682 and 50,717, respectively; shares outstanding 39,507 and 38,801, respectively	6	6
Additional paid-in capital	526,526	502,902
Treasury stock, at cost, 12,175 and 11,916 shares, respectively	(165,542)	(159,352)
Accumulated deficit	(94,580)	(93,988)
Accumulated other comprehensive loss	(2,028)	(3,531)
Total stockholders’ equity	264,382	246,037
Total liabilities and stockholders’ equity	$ 406,399	$ 315,289

Note 5 - Debt (Details Textual) - The Credit Facilities [Member] $ in Millions	Mar. 07, 2025 USD ($)	Mar. 31, 2030 USD ($)	Sep. 30, 2025 USD ($)
Debt Instrument Covenant Net Leverage Ratio	3
Fixed Charge Coverage Ratio	1.25
Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Term Loan [Member]
Debt Instrument, Face Amount	$ 25.0
Term Loan [Member] \| Base Rate [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Term Loan [Member] \| Base Rate [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Term Loan [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Term Loan [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.75%
Revolving Credit Facility [Member]
Debt Instrument, Face Amount	$ 45.0		$ 45.0
Debt Instrument, Periodic Payment, Principal	$ 0.6
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.50%
Revolving Credit Facility [Member] \| Base Rate [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Revolving Credit Facility [Member] \| Base Rate [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Revolving Credit Facility [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Revolving Credit Facility [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.75%
Revolving Credit Facility [Member] \| Forecast [Member]
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid		$ 13.1

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Sep. 30, 2025	Dec. 31, 2024
Preferred stock, par value (in dollars per share)	$ 0.00015	$ 0.00015
Preferred stock, shares authorized (in shares)	5,000	5,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.00015	$ 0.00015
Common stock, authorized (in shares)	70,000	70,000
Common stock, issued (in shares)	51,682	50,717
Common stock, outstanding (in shares)	39,507	38,801
Treasury stock, shares (in shares)	12,175	11,916

Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Increase (Decrease) in Income Taxes				$ (400)
Income Tax Expense (Benefit)		$ 2,193	$ 1,424	$ 1,154	$ 1,587
Effective Income Tax Rate Reconciliation, Percent				205.00%	31.00%
Unrecognized Tax Benefits	$ 17,000	17,000		$ 17,000		$ 16,600
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,300	2,300		2,300		$ 2,100
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	2,900	2,900		2,900
Unrecognized Tax Benefits In Deferred Tax Assets	600	600		600
Deferred Tax Assets, Gross	14,700	14,700		14,700
Deferred Tax Assets, Valuation Allowance	67,900	67,900		67,900
Income Tax Adjustment, Accelerated Research and Development Expense	$ 900	$ 900		$ 900
Income Tax Adjustment, Accelerated Research and Development Expense, Percentage Change	19.00%

Note 9 - Net Income (Loss) Per Share (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*			*2024*
Numerator:
Net income (loss)	$	1,294	$	2,206	$	(592	)	$	3,518
Denominator:
Basic weighted average common shares outstanding		39,500		38,710		39,247			38,542
Effect of dilutive stock options, unvested restricted stock units, and shares of common stock expected to be issued under employee stock purchase plan		119		395		—			486
Diluted weighted average common shares outstanding		39,619		39,105		39,247			39,028

Net income (loss) per share:
Basic	$	0.03	$	0.06	$	(0.02	)	$	0.09
Diluted	$	0.03	$	0.06	$	(0.02	)	$	0.09

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Non-vested restricted stock units		918		1,078		2,012		740
Outstanding stock options		2		—		20		—
Shares issuable under employee stock purchase plan		56		—		56		—
Total		976		1,078		2,088		740

Note 9 - Net Loss Per Share - Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net income (loss)	$ 1,294	$ 2,206	$ (592)	$ 3,518
Basic (in shares)	39,500	38,710	39,247	38,542
Effect of dilutive stock options, unvested restricted stock units, and shares of common stock expected to be issued under employee stock purchase plan (in shares)	119	395	0	486
Diluted weighted average common shares outstanding (in shares)	39,619	39,105	39,247	39,028
Basic (in dollars per share)	$ 0.03	$ 0.06	$ (0.02)	$ 0.09
Diluted (in dollars per share)	$ 0.03	$ 0.06	$ (0.02)	$ 0.09

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

Note 10 - Customer and Geographic Information - Revenue Percentage by Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Customer A [Member]
Performance obligations, percentage	38.00%	19.00%	24.00%	21.00%
Customer B [Member]
Performance obligations, percentage	12.00%		14.00%	12.00%
Customer C [Member]
Performance obligations, percentage			11.00%
Customer D [Member]
Performance obligations, percentage		13.00%

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details

Note 2 - Revenue From Contracts With Customers - Schedule of Capitalized Costs (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2025

Sep. 30, 2024

Sep. 30, 2025

Sep. 30, 2024

Dec. 31, 2024

Current (included in Prepaid expenses and other current assets)

$ 2,358

$ 2,929

Non-current (included in Other non-current assets)

^[1]

4,257

2,385

Total capitalized direct sales commission costs

6,615

$ 5,314

Amortization of capitalized direct sales commission costs

$ 720

$ 667

$ 2,217

$ 1,941

[1]	See Note 2, Revenue from Contracts with Customers.

Note 7 - Employee Benefit Plans - Schedule of Valuation Assumptions (Details) - The 2021 Purchase Plan [Member] - $ / shares	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Expected life (in years) (Year)	1 year 3 months	1 year 3 months
Volatility	44.70%	40.97%
Risk-free interest rate	4.07%	4.61%
Expected dividend	0.00%	0.00%
Weighted average fair value of purchase rights granted during the period (in dollars per share)	$ 8.78	$ 10.91

Note 3 - Balance Sheet Components - Amortization of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
2025 (remaining three months)	$ 2,066
2026	8,095
2027	7,943
2028	7,637
2029	5,952
2030 and thereafter	22,553
Total future amortization expense	$ 54,246	$ 12,307

Note 4 - Leases

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Lessee, Operating Leases [Text Block]

4. LEASES

The Company leases administrative and sales offices and certain equipment under non-cancellable operating leases, which contain various renewal or termination options and, in some cases, require payment of common area costs, taxes and utilities. These operating leases expire at various dates through 2031. The Company had no leases that were classified as a financing lease as of September 30, 2025, and December 31, 2024.

Lease expense was comprised of the following (in thousands):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Operating lease expense	$	458	$	401	$	1,307	$	1,161
Short-term lease and variable lease expense (1)		190		268		590		754
Total lease expense	$	648	$	669	$	1,897	$	1,915

(1)

Leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets, and the Company recognizes lease expense for these leases on a straight-line basis over the lease term. Variable lease expense for the periods presented primarily included common area maintenance charges.

Supplemental condensed consolidated balance sheets information related to operating leases was as follows:

	*September 30,*			*December 31,*
	*2025*			*2024*
Weighted average remaining lease term under operating leases (in years)		3.4			3.3
Weighted average discount rate for operating lease liabilities		6.2	%		6.0	%

Maturities of operating lease liabilities as of September 30, 2025, were as follows (in thousands):

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	517
2026		2,214
2027		2,121
2028		1,351
2029		352
2030 and thereafter		374
Total future minimum lease payments		6,929
Less: Interest (1)		(703	)
Present value of future minimum lease payments under operating lease liabilities	$	6,226
Reported as of September 30, 2025:
Operating lease liabilities – current	$	1,970
Operating lease liabilities – non-current		4,256
Total operating lease liabilities	$	6,226

(1)

Calculated using incremental borrowing interest rate for each lease.

Note 2 - Revenue From Contracts With Customers 2 (Details Textual)	Sep. 30, 2025
Software License and Related Services Agreement [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	2 years

Note 13 - Strategic Partnership Agreement With Advantest and Related Party Transactions

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

13. STRATEGIC PARTNERSHIP AGREEMENT WITH ADVANTEST AND RELATED PARTY TRANSACTIONS

In July 2020, the Company entered into a long-term strategic partnership with Advantest Corporation through its wholly-owned subsidiary, Advantest America, Inc. (collectively referred to herein as “Advantest”), which includes: (i) a Securities Purchase Agreement wherein the Company issued and sold to Advantest America, Inc., an aggregate of 3,306,924 shares of its common stock, for aggregate gross proceeds of $65.2 million; (ii) a significant agreement for its assistance in development of cloud-based applications for Advantest tools that leverages our Exensio analytics software; (iii) a commercial agreement providing for the license to third parties of solutions that result from the development work that combine Advantest’s testing applications and our Exensio platform; and (iv) a 5-year cloud-based subscription that expired in July 2025 for Exensio analytics software and related services.

Analytics revenue recognized from Advantest was $1.4 million and $3.3 million during the three months ended September 30, 2025 and 2024, respectively, and $8.5 million and $9.2 million during the nine months ended September 30, 2025 and 2024, respectively. Accounts receivable from Advantest were not material as of September 30, 2025, and December 31, 2024. Deferred revenue amounted to $1.0 million and $8.3 million as of September 30, 2025, and December 31, 2024, respectively.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/850/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-6

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

+ Details

Note 11 - Fair Value Measurements

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Fair Value Disclosures [Text Block]

11. FAIR VALUE MEASUREMENTS

Fair value is the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The multiple assumptions used to value financial instruments are referred to as inputs, and a hierarchy for inputs used in measuring fair value is established, that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions. These inputs are ranked according to a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels.

Level 1 -	Inputs are quoted prices in active markets for identical assets or liabilities.

Level 2 -	Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.

Level 3 -	Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.

The Company’s financial assets measured at fair value on a recurring basis and the basis for those measurements were as follows (in thousands):

		*Fair Value Measurements Using*
	*Balance Sheet*	*September 30,*
Assets	*Classification*	*2025*		*(Level 1)*		*(Level 2)*		*(Level 3)*
Money market mutual funds	Cash equivalents	$	4,394	$	4,394	$	—	$	—
Available-for-sale debt securities:
Convertible note receivable (1)	Other current assets		2,113		—		—		2,113
Total		$	6,507	$	4,394	$	—	$	2,113

		*Fair Value Measurements Using*
	*Balance Sheet*	*December 31,*
Assets	*Classification*	*2024*		*(Level 1)*		*(Level 2)*		*(Level 3)*
Money market mutual funds	Cash equivalents	$	66,213	$	66,213	$	—	$	—
Available-for-sale debt securities:
U.S. Government securities (2)	Short-term investments		24,291		24,291		—		—
Convertible note receivable (1)	Other non-current assets		2,038		—		—		2,038
Total		$	92,542	$	90,504	$	—	$	2,038

(1)

In August 2024, the Company purchased a $2.0 million non-marketable convertible promissory note from an unrelated third party (the “convertible note”). The convertible note bears a 5% interest rate annually and will mature in August 2026.

(2)

The amortized cost of the Company’s investments in U.S. Government securities approximated their fair value due to their short-term maturities, and there have been no events or changes in circumstances that would have had a significant effect on the fair value of these securities in the periods presented. For the three and nine months ended September 30, 2025 and 2024, there were no material realized or unrealized gains or losses, either individually or in the aggregate.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
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-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
-Publisher FASB
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
-SubTopic 820
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended		30 Months Ended
	Apr. 15, 2025	Apr. 11, 2022	Sep. 30, 2025	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2024
Treasury Stock, Value, Acquired, Cost Method			$ 244	$ 6,899
The 2022 Program [Member]
Share Repurchase Program, Authorized, Amount		$ 35,000
Share Repurchase Program, Period in Force (Year)		2 years
Treasury Stock, Shares, Acquired (in shares)						201,561	937,501
Shares Acquired, Average Cost Per Share (in dollars per share)						$ 34.23	$ 25.96
Treasury Stock, Value, Acquired, Cost Method						$ 6,900	$ 24,300
The 2024 Program [Member]
Share Repurchase Program, Authorized, Amount	$ 40,000
Share Repurchase Program, Period in Force (Year)	2 years
Treasury Stock, Shares, Acquired (in shares)					12,500	0
Shares Acquired, Average Cost Per Share (in dollars per share)					$ 19.55
Treasury Stock, Value, Acquired, Cost Method					$ 200
Share Repurchase Program, Remaining Authorized, Amount			$ 39,800		$ 39,800

Note 4 - Leases - Maturity of Operating Lease Liabilities (Details) - USD ($)
$ in Thousands

Sep. 30, 2025

Dec. 31, 2024

2025 (remaining three months)

$ 517

2,214

2,121

1,351

352

374

Total future minimum lease payments

6,929

Less: Interest (1)

^[1]

(703)

Present value of future minimum lease payments under operating lease liabilities

6,226

Operating lease liabilities – current

1,970

$ 1,675

Operating lease liabilities – non-current

4,256

$ 3,504

Total operating lease liabilities

$ 6,226

[1]	Calculated using incremental borrowing interest rate for each lease.

Note 11 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Aug. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Payments to Acquire Notes Receivable		$ (0)	$ 2,000
Notes Receivable [Member] \| Corporate Debt Securities [Member]
Payments to Acquire Notes Receivable	$ 2,000
Receivable with Imputed Interest, Effective Yield (Interest Rate)	5.00%

Note 14 - Business Combination - Schedule of Recognized Asset Acquired and Liability (Details) - USD ($) $ in Thousands		9 Months Ended
	Mar. 07, 2025	Sep. 30, 2025	Dec. 31, 2024
Amortization period (Year)		8 years 9 months 18 days
Goodwill		$ 96,780	$ 14,953
Secure Wise Business [Member]
Cash	$ 1,049
Accounts receivable	2,969
Prepaid and other assets	1,049
Fixed assets	1,592
Goodwill	81,799
Accounts payable and other current liabilities	(4,791)
Total purchase price allocation	130,767
Secure Wise Business [Member] \| Trademarks [Member]
Fair value of intangible assets	$ 6,600
Amortization period (Year)	5 years
Secure Wise Business [Member] \| Customer Relationships [Member]
Fair value of intangible assets	$ 28,900
Amortization period (Year)	13 years
Secure Wise Business [Member] \| Developed Technology Rights [Member]
Fair value of intangible assets	$ 11,600
Amortization period (Year)	7 years

Note 3 - Balance Sheet Components - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands

Sep. 30, 2025

Dec. 31, 2024

Prepaid expense

$ 8,554

$ 6,481

Contract assets

11,361

3,224

Current (included in Prepaid expenses and other current assets)

2,358

2,929

Net investments in sales-type leases - current portion

9,713

4,526

Income tax receivable

1,193

285

Convertible note receivable (1)

^[1]

2,113

Total prepaid expenses and other current assets

$ 35,292

$ 17,445

[1]	See Note 11, Fair Value Measurements.

Note 3 - Balance Sheet Components - Schedule of Other Non-current Assets (Details) - USD ($)
$ in Thousands

Sep. 30, 2025

Dec. 31, 2024

Net investments in sales-type leases (3)

^[1]

$ 15,103

$ 13,226

Unbilled accounts receivable (2)

^[2]

10,576

8,983

Costs capitalized to obtain revenue contracts (1)

^[3]

4,257

2,385

Contract assets (1)

^[3]

108

617

Other

1,924

4,302

Total other non-current assets

$ 31,968

$ 29,513

[1]	The Company’s net investments in sales-type leases were for its DFI™ system and CV® system assets. The components of net investments in sales-type leases were as follows (in thousands):
[2]	See Note 3, Balance Sheet Components – Accounts Receivable.
[3]	See Note 2, Revenue from Contracts with Customers.

Note 3 - Balance Sheet Components (Details Textual) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2025

Sep. 30, 2024

Sep. 30, 2025

Sep. 30, 2024

Dec. 31, 2024

Unbilled Receivables, Current

$ 39,800

$ 23,000

Unbilled Receivables, Not Billable, Amount Expected to be Collected after Next 12 Months

^[1]

10,576

8,983

Accounts Receivable, Allowance for Credit Loss

900

Depreciation, Depletion and Amortization, Nonproduction

1,100

$ 800

$ 2,600

$ 2,900

Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)

8 years 9 months 18 days

Goodwill and Intangible Asset Impairment

$ 0

Sales-type Lease, Net Investment in Lease, Allowance for Credit Loss

$ 0

[1]	See Note 3, Balance Sheet Components – Accounts Receivable.

Note 14 - Business Combination (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]

				*Amortization*
	*Amount*			*Period (Years)*
Allocation of Purchase Price:
Fair value estimates of assets acquired and liabilities assumed
Cash	$	1,049
Accounts receivable		2,969
Prepaid and other assets		1,049
Fixed assets		1,592
Fair value of intangible assets:
Trademark		6,600		5
Customer relationships		28,900		13
Developed technology		11,600		7
Goodwill		81,799		N/A
Accounts payable and other current liabilities		(4,791	)
Total purchase price allocation	$	130,767

Note 5 - Debt - Schedule of Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Total debt	$ 68,750
Unamortized debt discount and financing costs	(1,192)
Total debt, net of unamortized debt discount and financing costs	67,558
Current portion of long-term debt, net	2,238	$ 0
Long-term debt, net	65,320	$ 0
Revolving Credit Facility [Member]
Total debt	45,000
Term Loan [Member]
Total debt	$ 23,750

- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References + Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
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+ Details

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities:
Net income (loss)	$ (592)	$ 3,518
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock-based compensation expense	19,059	18,540
Depreciation and amortization	2,637	2,895
Amortization of acquired intangible assets	(5,189)	(2,466)
Amortization of costs capitalized to obtain revenue contracts	(2,217)	(1,941)
Net accretion of discounts on short-term investments	(279)	(1,239)
Recovery from previously written-off property and equipment	(641)	0
Deferred taxes	(36)	35
Other	(303)	(556)
Changes in operating assets and liabilities:
Accounts receivable	1,737	(1,743)
Prepaid expenses and other current assets	(19,042)	(8,831)
Operating lease right-of-use assets	1,180	1,241
Other non-current assets	1,303	(11,478)
Accounts payable	3,208	2,995
Accrued compensation and related benefits	140	(1,608)
Accrued and other liabilities	(2,821)	(16)
Deferred revenues	(5,054)	1,292
Operating lease liabilities	(1,262)	(1,285)
Net cash provided by operating activities	6,712	8,097
Cash flows from investing activities:
Proceeds from maturities and sales of short-term investments	27,498	57,125
Purchases of short-term investments	(2,937)	(43,054)
Purchases of property and equipment	(22,840)	(11,518)
Prepayment for the purchase of property and equipment	(214)	(365)
Recovery from previously written-off property and equipment	641	0
Payment for business acquisition, net of cash acquired	(129,718)	0
Net cash provided by (used in) investing activities	(127,570)	188
Purchase of convertible promissory note	0	(2,000)
Cash flows from financing activities:
Proceeds from long-term debt, net of debt financing costs	69,550	0
Payments of debt issuance costs	(900)	0
Repayments of long-term debt	(1,250)	0
Proceeds from exercise of stock options and employee stock purchase plan	4,243	4,187
Payments for taxes related to net share settlement of equity awards	(5,946)	(8,196)
Repurchases of common stock	(244)	(6,899)
Net cash provided by (used in) financing activities	65,453	(10,908)
Effect of exchange rate changes on cash and cash equivalents	691	73
Net change in cash and cash equivalents	(54,714)	(2,550)
Cash and cash equivalents at beginning of period	90,594	98,978
Cash and cash equivalents at end of period	35,880	96,428
Supplemental disclosure of cash flow information:
Cash paid for income taxes	2,148	2,064
Cash paid for amounts included in the measurement of operating lease liabilities	1,449	1,290
Cash paid for interest on long-term debt	2,622	0
Supplemental disclosure of noncash information:
Prepayments for purchase of property and equipment transferred from prepaid assets to property and equipment	377	89
Property and equipment received and accrued in accounts payable and accrued and other current liabilities	11,318	4,774
Stock-based compensation capitalized as property and equipment	322	233
Property and equipment transferred to sales-type leases and from other non-current assets, net	3,242	4,021
Operating lease liabilities arising from obtaining right-of-use assets	$ 2,292	$ 679

Note 2 - Revenue From Contracts With Customers

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

2. REVENUE FROM CONTRACTS WITH CUSTOMERS

The Company derives revenue from two sources: Analytics and Integrated Yield Ramp.

The Company recognizes revenue in accordance with FASB Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers, and its related amendments (collectively known as “ASC 606”). ASC 606 outlines a single comprehensive model to use in accounting for revenue arising from contracts with customers. Revenue is recognized when control of products or services is transferred to customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those promised products or services.

The Company determines revenue recognition through the following five steps:

●

Identification of the contract, or contracts, with a customer

●

Identification of the performance obligations in the contract

●

Determination of the transaction price

●

Allocation of the transaction price to the performance obligations in the contract

●

Recognition of revenue when, or as, performance obligations are satisfied

The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance, and collectibility of consideration is probable.

Contracts with Multiple Performance Obligations

The Company enters into contracts that can include various combinations of licenses, products and services, some of which are distinct and are accounted for as separate performance obligations. For contracts with multiple performance obligations, the Company allocates the transaction price of the contract to each performance obligation on a relative basis using the standalone selling price (“SSP”).

Analytics Revenue

Analytics revenue is derived from the following primary offerings: licenses and services for on-premise software (which is primarily Exensio^® and Cimetrix^® products, and includes some secureWISE^® products), software-as-a-service (“SaaS”) (which is primarily Exensio products, and includes some secureWISE products and services), and Design-for-Inspection™ (or DFI™) systems and Characterization Vehicle^® (or CV^®) systems that do not include performance incentives based on customers’ yield achievement.

Revenue from on-premise software is recognized depending on whether the license is perpetual or time-based. Perpetual (one-time charge) license software is recognized at the time of the inception of the arrangement when control transfers to the customers if the software license is considered as a separate performance obligation from the services offered by the Company. Revenue from post-contract support is recognized over the contract term on a straight-line basis, because the Company is providing (i) support and (ii) unspecified software updates on a when-and-if available basis over the contract term. Revenue from time-based-licensed software is allocated to each performance obligation and is recognized either at a point in time or over time as follows. The license component is recognized at the time when control transfers to customers, with the post-contract support component recognized ratably over the committed term of the contract. For contracts with any combination of licenses, support, and other services, distinct performance obligations are accounted for separately. For contracts with multiple performance obligations, the Company allocates the transaction price of the contract to each performance obligation on a relative basis using the SSP attributed to each performance obligation.

Revenue from SaaS arrangements, which allow for the use of a software product or service over a contractually determined period of time without the customer taking possession of the software, e.g., cloud-based or via a network of secureWISE servers, is accounted for as a subscription and is recognized as revenue ratably, on a straight-line basis, over the subscription period beginning on the date the service is first made available to customers. For contracts with any combination of SaaS and related services, distinct performance obligations are accounted for separately. For contracts with multiple performance obligations, the Company allocates the transaction price of the contract to each performance obligation on a relative basis using the SSP attributed to each performance obligation.

Revenue from DFI systems and CV systems (including Characterization services) that do not include performance incentives based on customers’ yield achievement is recognized primarily as services are performed. Where there are distinct performance obligations, the Company allocates revenue to all deliverables based on their SSPs. For those contracts with multiple performance obligations, the Company allocates the transaction price of the contract to each performance obligation on a relative basis using the SSP attributed to each performance obligation. Where there are not discrete performance obligations, historically, revenue is primarily recognized as services are performed using a percentage of completion method based on costs or labor-hours inputs, whichever is the most appropriate measure of the progress towards completion of the contract. The estimation of percentage of completion method is complex and subject to many variables that require significant judgment. Please refer to the “Significant Judgments” section of this Note for further discussion.

The Company also leases some of its DFI system and CV system assets to some customers. The Company determines the existence of a lease when the customer controls the use of these identified assets for a period of time defined in the lease agreement and classifies such leases as operating leases or sales-type leases. A lease is classified as a sales-type lease if it meets certain criteria under ASC Topic 842, Leases; otherwise, it is classified as an operating lease. Operating lease revenue is recognized on a straight-line basis over the lease term. Sales-type lease revenue and corresponding lease receivables are recognized at lease commencement based on the present value of the future lease payments, and related interest income on lease receivable is recognized over the lease term and are recorded under Analytics revenue in the condensed consolidated statements of comprehensive income (loss). Payments under sales-type leases are discounted using the interest rate implicit in the lease. When the Company’s leases are embedded in contracts with customers that include non-lease performance obligations, the Company allocates consideration in the contract between lease and non-lease components based on their relative SSPs. Assets subject to operating leases remain in property and equipment and continue to be depreciated. Assets subject to sales-type leases are derecognized from property and equipment, net at lease commencement and a net investment in the lease asset is recognized in prepaid expenses and other current assets and other non-current assets in the condensed consolidated balance sheets.

The Company generates revenue from the sale of DFI system products. Revenue is recognized at a point in time when the Company’s performance obligations have been completed, and the customer has accepted the product.

Integrated Yield Ramp Revenue

Integrated Yield Ramp revenue is comprised of all fees from the Company’s contracts that include any performance incentives based on customers’ yield achievement.

Fixed fees under these project-based contracts, which are delivered over a specific period of time and typically paid on a set schedule, are recognized as services are performed using a percentage of completion method based on costs or labor-hours inputs, whichever is the most appropriate measure of the progress towards completion of the contract. Where there are distinct performance obligations, the Company allocates revenue to all deliverables based on their SSPs and allocates the transaction price of the contract to each performance obligation on a relative basis using the SSP. Similar to the services provided in connection with DFI systems and CV systems that are contributing to Analytics revenue, due to the nature of the work performed in these arrangements, the estimation of percentage of completion method is complex and subject to many variables that require significant judgment. Please refer to the “Significant Judgments” section of this Note for further discussion.

Variable fees contained in Integrated Yield Ramp contracts that relate to continued usage of the Company’s intellectual property after the fixed-fee service period ends depend on a customer’s yield achievement (which the Company refers to as “Gainshare fees”) and are generally subsequent to the delivery of all contractual services and performance obligations. The Company typically recognizes Gainshare as a usage-based royalty derived from customers’ usage of intellectual property in the same period in which the usage occurs.

Disaggregation of Revenue

The Company disaggregates revenue from contracts with customers into the timing of the transfer of goods and services and the geographical regions. The Company determined that disaggregating revenue into these categories achieves the disclosure objective to depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors.

The Company’s performance obligations are satisfied either over time or at a point-in-time. The following table represents a disaggregation of revenue percentage by timing of revenue:

	*Three Months Ended September 30,*						*Nine Months Ended September 30,*
	*2025*			*2024*			*2025*			*2024*
Over time		80	%		64	%		71	%		67	%
Point-in-time		20	%		36	%		29	%		33	%
Total		100	%		100	%		100	%		100	%

International revenues accounted for approximately 47% and 55% of the Company’s total revenues during the three months ended September 30, 2025 and 2024, respectively, and approximately 57% and 55% of the Company’s total revenues during the nine months ended September 30, 2025 and 2024, respectively. See Note 10, Customer and Geographic Information.

Significant Judgments

Judgments and estimates are required under ASC 606. Due to the complexity of certain contracts, the actual revenue recognition treatment required under ASC 606 for the Company’s arrangements may be dependent on contract-specific terms and may vary in some instances.

For revenue under project-based contracts for fixed-price services, revenue is recognized as services are performed using a percentage-of-completion method based on costs or labor-hours input method, whichever is the most appropriate measure of the progress towards completion of the contract. Due to the nature of the work performed in these arrangements, the estimation of percentage of completion method is complex, subject to many variables and requires significant judgment. Key factors reviewed by the Company to estimate costs to complete each contract are future labor and product costs and expected productivity efficiencies. If circumstances arise that change the original estimates of revenues, costs, or extent of progress toward completion, revisions to the estimates are made. These revisions may result in increases or decreases in estimated revenues or costs, and such revisions are reflected in revenue on a cumulative catch-up basis in the period in which the circumstances that gave rise to the revision become known.

The Company’s contracts with customers often include promises to transfer products, software licenses and provide services, including professional services, technical support services, and rights to unspecified updates to a customer. Determining whether licenses and services are distinct performance obligations that should be accounted for separately, or not distinct and thus accounted for together, requires significant judgment. The Company is required to estimate the range of the SSPs for each performance obligation and in instances where the SSP is not directly observable because the Company does not license the software or sell the service separately, the Company determines the SSP using information that may include market conditions and other observable inputs.

The Company is required to recognize Gainshare revenue in the same period in which the usage occurs. Because the Company generally does not receive the acknowledgment reports from its customers during a given quarter within the time frame necessary to adequately review the reports and include the actual amounts in quarterly results for such quarter, the Company accrues the related revenue based on estimates of customers underlying sales achievement. The Company’s estimation process can be based on historical data, trends, seasonality, changes in the contract rate, knowledge of the changes in the industry and changes in the customer’s manufacturing environment learned through discussions with customers and sales personnel. As a result of accruing revenue for the quarter based on such estimates, adjustments will be required in the following quarter to true-up revenue to the actual amounts reported.

Contract Balances

The Company performs its obligations under a contract with a customer primarily by licensing software or providing services in exchange for consideration from the customer. The timing of the Company’s performance often differs from the timing of the customer’s payment, which results in the recognition of a receivable, a contract asset or a contract liability.

The Company classifies the right to consideration in exchange for software or services transferred to a customer as either a receivable or a contract asset. A receivable is a right to consideration that is unconditional, as compared to a contract asset, which is a right to consideration that is conditional upon factors other than the passage of time. The majority of the Company’s contract assets represent unbilled amounts related to fixed-price service contracts when the revenue recognized exceeds the amount billed to the customer.

The contract assets are recorded on a net basis with deferred revenue (i.e., contract liabilities) at the contract level. The contract assets were as follows (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
Current (included in Prepaid expenses and other current assets)	$	11,361	$	3,224
Non-current (included in Other non-current assets)		108		617
Total contract assets	$	11,469	$	3,841

The Company did not record any asset impairment charges related to contract assets for the periods presented.

Deferred revenues and billings in excess of recognized revenues consist substantially of amounts invoiced in advance of revenue recognition and are recognized as the revenue recognition criteria are met. Deferred revenues that will be recognized during the succeeding twelve-month period are recorded as current deferred revenues and the remaining portion is recorded in other non-current liabilities in the condensed consolidated balance sheets.

Deferred revenues were as follows (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
Current	$	21,247	$	25,005
Non-current (included in Other non-current liabilities)		869		1,512
Total deferred revenues	$	22,116	$	26,517

Additional information related to deferred revenue were as follows (in thousands):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Revenue recognized that was included in the deferred revenues and billings in excess of recognized revenues balances at the beginning of each period	$	10,542	$	12,040	$	23,516	$	24,669

As of September 30, 2025, the aggregate amount of the transaction prices allocated to the remaining performance obligations related to customer contracts that were unsatisfied or partially unsatisfied was approximately $292.0 million. Given the applicable contract terms with customers, more than half of this amount is expected to be recognized as revenue over the next two years with the remainder to be recognized thereafter. This amount does not include insignificant contracts to which the customer is not committed, nor significant contracts for which the Company recognizes revenue equal to the amount the Company has the right to invoice for services performed, or future sales-based or usage-based royalty payments in exchange for a license of intellectual property. This amount is subject to change due to future revaluations of variable consideration, terminations, other contract modifications, or currency adjustments. The estimated timing of the recognition of remaining unsatisfied performance obligations is subject to change and is affected by changes to the scope, change in timing of delivery of products and services, or contract modifications.

The adjustment to revenue recognized from performance obligations satisfied (or partially satisfied) in previous periods was a decrease of $1.0 million and a decrease of $0.7 million during the three months ended September 30, 2025 and 2024, respectively, and an increase of $0.2 million and a decrease of $1.4 million during the nine months ended September 30, 2025 and 2024, respectively. These amounts primarily represent changes in estimated percentage-of-completion based contracts and changes in actual versus estimated Gainshare.

Costs to Obtain or Fulfill a Contract

The Company capitalizes the incremental costs to obtain or fulfill a contract with a customer, including direct sales commissions and related fees, when it expects to recover those costs. Amortization expense related to these capitalized costs is recognized over the period associated with the revenue from which the cost was incurred.

Total capitalized direct sales commission costs and related fees were as follows (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
Current (included in Prepaid expenses and other current assets)	$	2,358	$	2,929
Non-current (included in Other non-current assets)		4,257		2,385
Total capitalized direct sales commission costs	$	6,615	$	5,314

Amortization of capitalized direct sales commission costs were as follows (in thousands):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Amortization of capitalized direct sales commission costs	$	720	$	667	$	2,217	$	1,941

There was no impairment loss in relation to the costs capitalized for the periods presented.

Practical Expedient

The Company does not adjust the transaction price for the effects of a significant financing component when the period between the transfers of the promised good or service to the customer and payment for that good or service by the customer is expected to be one year or less. The Company assessed each of its revenue generating arrangements in order to determine whether a significant financing component exists, and determined its contracts did not include a material significant financing component during the nine months ended September 30, 2025 and 2024.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-15

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
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-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
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-Subparagraph (b)
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Subparagraph (b)(2)
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-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

+ Details

Note 10 - Customer and Geographic Information (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*			*2024*
Total revenues	$	57,115	$	46,409	$	156,621		$	129,380
Costs of revenues	$	15,840	$	12,484	$	43,681		$	38,243
Gross profit	$	41,275	$	33,925	$	112,940		$	91,137
Income from operations	$	4,827	$	2,119	$	2,389		$	423
Net income (loss)	$	1,294	$	2,206	$	(592	)	$	3,518

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	*Three Months Ended September 30,*						*Nine Months Ended September 30,*
Customer	*2025*			*2024*			*2025*			*2024*
A		38	%		19	%		24	%		21	%
B		12	%		*	%		14	%		12	%
C		*	%		*	%		11	%		*	%
D		*	%		13	%		*	%		*	%

Receivables by Major Customers [Table Text Block]

	*September 30,*			*December 31,*
Customer	*2025*			*2024*
A		35	%		21	%
B		*	%		13	%
C		26	%		11	%
E		*	%		12	%

Revenue from External Customers by Geographic Areas [Table Text Block]

	*Three Months Ended September 30,*										*Nine Months Ended September 30,*
	*2025*					*2024*					*2025*					*2024*
			*Percentage*					*Percentage*					*Percentage*					*Percentage*
	*Revenues*		*of Revenues*			*Revenues*		*of Revenues*			*Revenues*		*of Revenues*			*Revenues*		*of Revenues*
United States	$	30,143		53	%	$	21,065		45	%	$	68,325		43	%	$	58,021		45	%
Japan		10,091		18			6,275		14			31,131		20			25,495		20
China		5,842		10			5,673		12			26,075		17			17,526		14
Taiwan		1,238		2			6,273		14			4,235		3			8,107		6
Rest of the world		9,801		17			7,123		15			26,855		17			20,231		15
Total revenues	$	57,115		100	%	$	46,409		100	%	$	156,621		100	%	$	129,380		100	%

Long-Lived Assets by Geographic Areas [Table Text Block]

	*September 30,*		*December 31,*
	*2025*		*2024*
United States (1)	$	85,110	$	58,782
Rest of the world		2,917		1,461
Total long-lived assets, net	$	88,027	$	60,243

Note 2 - Revenue From Contracts With Customers - Schedule of Disaggregation of Revenue (Details) - Revenue from Contract with Customer Benchmark [Member] - Performance Obligation Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Performance obligations, percentage	100.00%	100.00%	100.00%	100.00%
Transferred over Time [Member]
Performance obligations, percentage	80.00%	64.00%	71.00%	67.00%
Transferred at Point in Time [Member]
Performance obligations, percentage	20.00%	36.00%	29.00%	33.00%

- Definition

+ References + Details

Insider Trading Arrangements	3 Months Ended	9 Months Ended
Insider Trading Arrangements	Sep. 30, 2025	Sep. 30, 2025
Trading Arrangements, by Individual [Table]
Material Terms of Trading Arrangement [Text Block]		Insider Adoption or Termination of Trading Arrangements During the quarter ended September 30, 2025, none of our directors or officers adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Regulation S-K, Item 408.
Rule 10b5-1 Arrangement Terminated [Flag]	false
Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false

Note 7 - Employee Benefit Plans - Schedule of Nonvested Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares shares in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Nonvested, Balance (in shares)	1,885
Nonvested, weighted average grant date fair value (in dollars per share)	$ 33.14
Granted (in shares)	955
Granted, weighted average grant date fair value (in dollars per share)	$ 21.85	$ 35.42
Vested (in shares)	(761)
Vested, weighted average grant date fair value (in dollars per share)	$ 29.58
Forfeited (in shares)	(68)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 32.63
Nonvested, Balance (in shares)	2,011
Nonvested, weighted average grant date fair value (in dollars per share)	$ 29.14

Note 10 - Customer and Geographic Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 57,115	$ 46,409	$ 156,621	$ 129,380
Costs of revenues	15,840	12,484	43,681	38,243
Gross profit	41,275	33,925	112,940	91,137
Income from operations	4,827	2,119	2,389	423
Net income (loss)	$ 1,294	$ 2,206	$ (592)	$ 3,518

- Definition

The aggregate cost of goods produced and sold and services rendered during the reporting period.

+ References

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- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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+ Details

Note 9 - Net Income (Loss) Per Share

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Earnings Per Share [Text Block]

9. NET INCOME (LOSS) PER SHARE

Basic net income (loss) per share is computed by dividing net loss by the weighted average number of common shares outstanding for the period (excluding outstanding stock options, nonvested restricted stock units and shares subject to repurchase). Diluted net income (loss) per share is computed using the weighted average number of common shares outstanding for the period plus the potential effect of dilutive securities which are convertible into common shares (using the treasury stock method), except in cases in which the effect would be anti-dilutive. The following is a reconciliation of the numerators and denominators used in computing basic and diluted net loss per share (in thousands except per share amount):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*			*2024*
Numerator:
Net income (loss)	$	1,294	$	2,206	$	(592	)	$	3,518
Denominator:
Basic weighted average common shares outstanding		39,500		38,710		39,247			38,542
Effect of dilutive stock options, unvested restricted stock units, and shares of common stock expected to be issued under employee stock purchase plan		119		395		—			486
Diluted weighted average common shares outstanding		39,619		39,105		39,247			39,028

Net income (loss) per share:
Basic	$	0.03	$	0.06	$	(0.02	)	$	0.09
Diluted	$	0.03	$	0.06	$	(0.02	)	$	0.09

For the nine months ended September 30, 2025, because the Company was in a loss position, diluted net loss per share is the same as basic net loss per share as the inclusion of the potential common shares would have been anti-dilutive.

The following table summarizes the potential shares of common stock that were not included in the diluted net loss per share calculation above because to do so would be anti-dilutive for the periods indicated (in thousands):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Non-vested restricted stock units		918		1,078		2,012		740
Outstanding stock options		2		—		20		—
Shares issuable under employee stock purchase plan		56		—		56		—
Total		976		1,078		2,088		740

Note 4 - Leases (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Lease, Cost [Table Text Block]

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Operating lease expense	$	458	$	401	$	1,307	$	1,161
Short-term lease and variable lease expense (1)		190		268		590		754
Total lease expense	$	648	$	669	$	1,897	$	1,915

	*September 30,*			*December 31,*
	*2025*			*2024*
Weighted average remaining lease term under operating leases (in years)		3.4			3.3
Weighted average discount rate for operating lease liabilities		6.2	%		6.0	%

Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	517
2026		2,214
2027		2,121
2028		1,351
2029		352
2030 and thereafter		374
Total future minimum lease payments		6,929
Less: Interest (1)		(703	)
Present value of future minimum lease payments under operating lease liabilities	$	6,226
Reported as of September 30, 2025:
Operating lease liabilities – current	$	1,970
Operating lease liabilities – non-current		4,256
Total operating lease liabilities	$	6,226

Note 3 - Balance Sheet Components - Schedule of Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Amortization of acquired technology (included in costs of revenues)	$ 998	$ 584	$ 2,674	$ 1,752
Amortization of acquired intangible assets	1,069	196	2,515	714
Total amortization expense	$ 2,067	$ 780	$ 5,189	$ 2,466

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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+ Details

Note 5 - Debt (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Maturities of Long-Term Debt [Table Text Block]

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	625
2026		2,500
2027		2,500
2028		2,500
2029		2,500
2030		58,125
Total future principal payments of long-term debt	$	68,750

The Credit Facilities [Member]

Notes Tables

Schedule of Long-Term Debt Instruments [Table Text Block]

	*September 30,*
	*2025*
Term loan	$	23,750
Revolving credit facility		45,000
Total debt (principal amount)		68,750
Unamortized debt discount and financing costs		(1,192	)
Total debt, net of unamortized debt discount and financing costs	$	67,558
Reported as:
Current portion of long-term debt, net	$	2,238
Long-term debt, net		65,320
Total debt, net	$	67,558

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Paragraph 1
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+ Details

Note 10 - Customer and Geographic Information - Receivables Percentage by Major Customers (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Customer A [Member]
Performance obligations, percentage	35.00%	21.00%
Customer B [Member]
Performance obligations, percentage		13.00%
Customer C [Member]
Performance obligations, percentage	26.00%	11.00%
Customer E [Member]
Performance obligations, percentage		12.00%

- Definition

+ References + Details

Note 3 - Balance Sheet Components - Schedule of Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Accrued expenses	$ 7,021	$ 7,156
Accrued income taxes	213	365
Other	1,427	1,231
Total accrued and other current liabilities	$ 8,661	$ 8,752

Note 11 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

		*Fair Value Measurements Using*
	*Balance Sheet*	*September 30,*
Assets	*Classification*	*2025*		*(Level 1)*		*(Level 2)*		*(Level 3)*
Money market mutual funds	Cash equivalents	$	4,394	$	4,394	$	—	$	—
Available-for-sale debt securities:
Convertible note receivable (1)	Other current assets		2,113		—		—		2,113
Total		$	6,507	$	4,394	$	—	$	2,113

		*Fair Value Measurements Using*
	*Balance Sheet*	*December 31,*
Assets	*Classification*	*2024*		*(Level 1)*		*(Level 2)*		*(Level 3)*
Money market mutual funds	Cash equivalents	$	66,213	$	66,213	$	—	$	—
Available-for-sale debt securities:
U.S. Government securities (2)	Short-term investments		24,291		24,291		—		—
Convertible note receivable (1)	Other non-current assets		2,038		—		—		2,038
Total		$	92,542	$	90,504	$	—	$	2,038

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2025
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	*Basis of Presentation* The interim unaudited condensed consolidated financial statements included herein have been prepared by PDF Solutions, Inc. (the “Company”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), including the instructions to the Quarterly Report on Form 10‑Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted. The interim unaudited condensed consolidated financial statements reflect, in the opinion of management, all adjustments necessary (consisting only of normal recurring adjustments) to present a fair statement of results for the interim periods presented. The operating results for any interim period are not necessarily indicative of the results that may be expected for other interim periods or the full fiscal year. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2024, filed with the SEC on February 27, 2025. The interim unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries after the elimination of all intercompany balances and transactions. The condensed consolidated balance sheet as of December 31, 2024 has been derived from the audited consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America.
Use of Estimates, Policy [Policy Text Block]	*Use of Estimates* The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in these condensed consolidated financial statements include revenue recognition, the estimated useful lives of property and equipment and intangible assets, fair value of convertible note receivable, assumptions made in analysis of allowance for credit losses, impairment of goodwill and long-lived assets, realization of deferred tax assets (“DTAs”), and accounting for lease obligations, stock-based compensation expense, and income tax uncertainties and contingencies. Actual results could differ from those estimates and may result in material effects on the Company’s operating results and financial position.
Reclassification, Comparability Adjustment [Policy Text Block]	*Reclassification of Prior Period Amount* Certain immaterial prior period amounts on the condensed consolidated balance sheet, condensed consolidated statements of stockholders' equity, and condensed consolidated statements of cash flows have been reclassified to conform with current period presentation.
New Accounting Pronouncements, Policy [Policy Text Block]	*Recent* *Accounting Standards* In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU is intended to improve the transparency of income tax disclosures by requiring (1) consistent categories and greater disaggregation of information in the rate reconciliation and (2) income taxes paid disaggregated by jurisdiction. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The ASU’s amendments are effective for public business entities for annual periods beginning after December 15, 2024. Entities are permitted to early adopt the standard for “annual financial statements that have not yet been issued or made available for issuance.” This ASU may be applied either prospectively or retrospectively. The Company will adopt this ASU on a prospective basis. The Company is currently evaluating the impact of the new standard on the consolidated financial statements and related disclosures. In November 2024, the FASB issued ASU No. 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. This ASU requires the disaggregation of certain expenses in the notes to the consolidated financial statements, to provide enhanced transparency into the expense captions presented on the face of the income statement. Additionally, in January 2025, FASB issued ASU 2025-01, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date to clarify the effective date of ASU 2024-03. This ASU is effective for annual periods beginning after December 15, 2026 and for interim periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact of the new standard on the consolidated financial statements and related disclosures. In July 2025, the FASB issued ASU 2025-05, Measurement of Credit Losses for Accounts Receivable and Contract Assets, which provides a practical expedient to measure credit losses on accounts receivable and contract assets. The ASU is effective for annual periods beginning after December 15, 2025, and interim periods within those annual reporting periods. Early adoption is permitted. The Company is currently evaluating the timing of the adoption and the impact of the new standard on the consolidated financial statements and related disclosures. In September 2025, the FASB issued ASU 2025-06, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40), related to accounting for internal-use software costs. The amendments in this ASU improve the operability of the guidance by removing all references to software development project stages so that the guidance is neutral to different software development methods. This update is effective for annual periods beginning after December 15, 2027, including interim periods within those fiscal years, though early adoption is permitted. The Company is currently evaluating the effects of the new standard on the consolidated financial statements and related disclosures. Management has reviewed other recently issued accounting pronouncements issued or proposed by the FASB and does not believe any of these accounting pronouncements has had or will have a material impact on the condensed consolidated financial statements.

- Definition

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

+ References

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+ Details

Note 5 - Debt - Schedule of Maturity (Details) $ in Thousands	Sep. 30, 2025 USD ($)
2025 (remaining three months)	$ 625
2026	2,500
2027	2,500
2028	2,500
2029	2,500
2030	58,125
Total future principal payments of long-term debt	$ 68,750

Note 5 - Debt

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Debt Disclosure [Text Block]

5. DEBT

Debt as of September 30, 2025, consisted of (in thousands):

	*September 30,*
	*2025*
Term loan	$	23,750
Revolving credit facility		45,000
Total debt (principal amount)		68,750
Unamortized debt discount and financing costs		(1,192	)
Total debt, net of unamortized debt discount and financing costs	$	67,558
Reported as:
Current portion of long-term debt, net	$	2,238
Long-term debt, net		65,320
Total debt, net	$	67,558

On March 7, 2025, the Company entered into a Credit Agreement (the “Credit Agreement”) with the lenders who are party to the Credit Agreement and the lenders who may become a party to the Credit Agreement pursuant to the terms thereof (the “Lenders”) and Wells Fargo Bank, National Association, as administrative agent to the Lenders (the “Agent”).

The Credit Agreement provides for (a) a revolving credit facility in an aggregate principal amount of $45.0 million (the “Revolving Credit Facility”) and (b) a term loan facility in an aggregate principal amount of $25.0 million (the “Term Loan” and together with the Revolving Credit Facility, the “Credit Facilities”).

The principal of the Revolving Credit Facility is due as a balloon payment of $45.0 million in March 2030. The principal of the Term Loan is due in the amount of $0.6 million quarterly and a balloon payment of $13.1 million in March 2030.

Borrowings under the Credit Facilities will accrue interest at rates equal, at the Company’s election, to (i) the alternate base rate, which is defined as the highest of (a) the federal funds effective rate in effect from time to time plus 0.50%, (b) the prime commercial lending rate in effect from time to time, and (c) the daily simple secured overnight financing rate (“SOFR”) plus 1.00% or (ii) SOFR, plus, in each case, the applicable margin. The applicable margin for the Revolving Credit Facility borrowings bearing interest at the alternate base rate ranges from 1.00% to 1.75%, and the applicable margin for Revolving Credit Facility borrowings bearing interest based on the SOFR ranges from 2.00% to 2.75%, in each case, based on the Company’s consolidated total net leverage ratio as of the most recently ended fiscal quarter. The applicable margin for Term Loan borrowings bearing interest at the alternate base rate ranges from 1.00% to 1.75%, and the applicable margin for Term Loan borrowings bearing interest based on the SOFR ranges from 2.00% to 2.75%, in each case, based on the Company’s consolidated total net leverage ratio as of the most recently ended fiscal quarter. The Company will pay an annual commitment fee during the term of the Credit Agreement at a rate per annum equal to 0.50% for any undrawn portion of the Revolving Credit Facility.

The Credit Agreement contains customary representations and warranties, as well as customary affirmative and negative covenants. Negative covenants include, among others, restrictions on the incurrence of debt, the incurrence of liens, the making of investments and distributions, dividends, and stock buy-backs. In addition, the Credit Agreement requires that the Company maintain a consolidated total net leverage ratio of not greater than 3.00 to 1.00, and a consolidated fixed charge coverage ratio of not less than 1.25 to 1.00. As of September 30, 2025, the Company was in compliance with the covenants contained in the Credit Agreement.

The Credit Agreement contains customary events of default. Upon the occurrence and during the continuance of an event of default, the Agent may declare the outstanding advances and all other obligations under the Credit Agreement immediately due and payable.

The obligations under the Credit Agreement are guaranteed by all present and future material domestic subsidiaries of the Company (collectively with the Company referred to herein as the “Credit Parties”), subject to customary exceptions, and are secured by the equity interests of the Credit Parties (other than the Company) and substantially all of the personal property owned by the Credit Parties, including 65% of the equity interests of certain foreign subsidiaries owned by the Credit Parties.

The Company used the amounts borrowed under the Credit Facilities to finance, in part, the purchase price paid for the acquisition of SecureWise (see Note 14, Business Combination).

Future Payments on Total Debt

As of September 30, 2025, the estimated future principal payments of the total long-term debt were as follows (in thousands):

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	625
2026		2,500
2027		2,500
2028		2,500
2029		2,500
2030		58,125
Total future principal payments of long-term debt	$	68,750

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

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-Section 50
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+ Details

Note 7 - Employee Benefit Plans - Allocation of Recognized Period Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Stock-based compensation expenses	$ 6,264	$ 6,730	$ 19,059	$ 18,540
Cost of Sales [Member]
Stock-based compensation expenses	1,274	1,366	3,873	3,751
Research and Development Expense [Member]
Stock-based compensation expenses	2,204	2,375	6,874	6,640
Selling, General and Administrative Expenses [Member]
Stock-based compensation expenses	$ 2,786	$ 2,989	$ 8,312	$ 8,149

Note 14 - Business Combination (Details Textual) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 07, 2025	Dec. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025
Payments to Acquire Businesses, Net of Cash Acquired			$ 129,718	$ (0)
Secure Wise Business [Member]
Payments to Acquire Businesses, Net of Cash Acquired	$ 130,000
Business Combination, Acquisition-Related Cost, Expense		$ 900	$ 4,600		$ 5,500
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Gross Contractual Amount	3,000
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Fair Value	$ 3,000

Note 9 - Net Loss Per Share - Anti-dilutive Securities (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Anti-dilutive securities (in shares)	976	1,078	2,088	740
Restricted Stock Units (RSUs) [Member]
Anti-dilutive securities (in shares)	918	1,078	2,012	740
Share-Based Payment Arrangement, Option [Member]
Anti-dilutive securities (in shares)	2	0	20	0
Employee Stock Purchase Plan [Member]
Anti-dilutive securities (in shares)	56	0	56	0

Note 3 - Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

	*September 30,*		*December 31,*
	*2025*		*2024*
Prepaid expense	$	8,554	$	6,481
Contract assets		11,361		3,224
Costs capitalized to obtain revenue contracts		2,358		2,929
Net investments in sales-type leases - current portion		9,713		4,526
Income tax receivable		1,193		285
Convertible note receivable (1)		2,113		—
Total prepaid expenses and other current assets	$	35,292	$	17,445

Property, Plant and Equipment [Table Text Block]

	*September 30,*			*December 31,*
	*2025*			*2024*
Computer equipment	$	13,900		$	10,799
Software and capitalized software development cost		6,352			5,617
Furniture, fixtures, and equipment		2,610			2,529
Leasehold improvements		7,023			6,691
Laboratory and other equipment		6,580			5,734
Test equipment		30,421			22,680
Property and equipment in progress:
DFI system assets		43,396			34,935
CV system and other assets		11,023			6,431
Total property and equipment		121,305			95,416
Less: Accumulated depreciation and amortization		(49,384	)		(46,951	)
Total property and equipment, net	$	71,921		$	48,465

Schedule of Goodwill [Table Text Block]

	*Nine Months Ended September 30,*
	*2025*
Balance at the beginning of period	$	14,953
Addition (1)		81,799
Foreign currency translation adjustment		28
Balance at the end of period	$	96,780

Schedule of Finite-Lived Intangible Assets [Table Text Block]

		*September 30, 2025*							*December 31, 2024*
	*Amortization*	*Gross*					*Net*		*Gross*					*Net*
	*Period*	*Carrying*		*Accumulated*			*Carrying*		*Carrying*		*Accumulated*			*Carrying*
	*(Years)*	*Amount*		*Amortization*			*Amount*		*Amount*		*Amortization*			*Amount*
Acquired intangible assets:
Customer relationships	1 - 13	$	38,402	$	(9,383	)	$	29,019	$	9,499	$	(7,866	)	$	1,633
Developed technology	4 - 9		46,198		(27,418	)		18,780		34,566		(24,601	)		9,965
Tradename and trademarks	2 - 10		8,198		(1,917	)		6,281		1,598		(1,120	)		478
Patent	6 - 10		2,100		(1,934	)		166		2,100		(1,869	)		231
Noncompetition agreements	3		848		(848	)		—		848		(848	)		—
Total		$	95,746	$	(41,500	)	$	54,246	$	48,611	$	(36,304	)	$	12,307

Finite-Lived Intangible Assets Amortization Expense [Table Text Block]

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Amortization of acquired technology (included in costs of revenues)	$	998	$	584	$	2,674	$	1,752
Amortization of acquired intangible assets (presented separately under costs and expenses)		1,069		196		2,515		714
Total amortization expense	$	2,067	$	780	$	5,189	$	2,466

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	2,066
2026		8,095
2027		7,943
2028		7,637
2029		5,952
2030 and thereafter		22,553
Total future amortization expense	$	54,246

Schedule of Other Assets, Noncurrent [Table Text Block]

	*September 30,*		*December 31,*
	*2025*		*2024*
Net investments in sales-type leases (3)	$	15,103	$	13,226
Unbilled accounts receivable (2)		10,576		8,983
Costs capitalized to obtain revenue contracts (1)		4,257		2,385
Contract assets (1)		108		617
Other		1,924		4,302
Total other non-current assets	$	31,968	$	29,513

Sale Leaseback Transactions [Table Text Block]

	*September 30,*		*December 31,*
	*2025*		*2024*
Present value of lease receivables	$	13,870	$	13,238
Less: Contract liability		—		(3,235	)
Net lease receivables		13,870		10,003
Unguaranteed residual assets		10,946		7,749
Total net investments in sales-type leases	$	24,816	$	17,752
Reported as:
Current (included in Prepaid expenses and other current assets)	$	9,713	$	4,526
Non-current (included in Other non-current assets)		15,103		13,226
Total net investments in sales-type leases	$	24,816	$	17,752

Sales-Type and Direct Financing Leases, Payment to be Received, Maturity [Table Text Block]

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	2,201
2026		9,601
2027		2,101
2028		10
2029 and thereafter		49
Total future sales-type lease payments		13,962
Less: Present value adjustment (1)		(92	)
Present value of lease receivables	$	13,870

Other Current Liabilities [Table Text Block]

	*September 30,*		*December 31,*
	*2025*		*2024*
Accrued expenses	$	7,021	$	7,156
Accrued income taxes		213		365
Other		1,427		1,231
Total accrued and other current liabilities	$	8,661	$	8,752

Note 3 - Balance Sheet Components - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Amortization Period (Year)	8 years 9 months 18 days
Gross Carrying Amount	$ 95,746	$ 48,611
Accumulated Amortization	(41,500)	(36,304)
Net Carrying Amount	54,246	12,307
Customer Relationships [Member]
Gross Carrying Amount	38,402	9,499
Accumulated Amortization	(9,383)	(7,866)
Net Carrying Amount	$ 29,019	1,633
Customer Relationships [Member] \| Minimum [Member]
Amortization Period (Year)	1 year
Customer Relationships [Member] \| Maximum [Member]
Amortization Period (Year)	13 years
Developed Technology Rights [Member]
Gross Carrying Amount	$ 46,198	34,566
Accumulated Amortization	(27,418)	(24,601)
Net Carrying Amount	$ 18,780	9,965
Developed Technology Rights [Member] \| Minimum [Member]
Amortization Period (Year)	4 years
Developed Technology Rights [Member] \| Maximum [Member]
Amortization Period (Year)	9 years
Trademarks and Trade Names [Member]
Gross Carrying Amount	$ 8,198	1,598
Accumulated Amortization	(1,917)	(1,120)
Net Carrying Amount	$ 6,281	478
Trademarks and Trade Names [Member] \| Minimum [Member]
Amortization Period (Year)	2 years
Trademarks and Trade Names [Member] \| Maximum [Member]
Amortization Period (Year)	10 years
Patents [Member]
Gross Carrying Amount	$ 2,100	2,100
Accumulated Amortization	(1,934)	(1,869)
Net Carrying Amount	$ 166	231
Patents [Member] \| Minimum [Member]
Amortization Period (Year)	6 years
Patents [Member] \| Maximum [Member]
Amortization Period (Year)	10 years
Noncompete Agreements [Member]
Amortization Period (Year)	3 years
Gross Carrying Amount	$ 848	848
Accumulated Amortization	(848)	(848)
Net Carrying Amount	$ 0	$ 0

Note 7 - Employee Benefit Plans

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Compensation and Employee Benefit Plans [Text Block]

7. EMPLOYEE BENEFIT PLANS

Employee Stock Purchase Plan

On June 15, 2021, the Company’s stockholders initially approved the 2021 Employee Stock Purchase Plan, which has been amended and restated by the Board of Directors and approved by the Company’s stockholders since then (as amended through the date of this report, the “2021 Purchase Plan”).

Under the 2021 Purchase Plan, eligible employees can contribute up to 10% of their compensation, as defined in the 2021 Purchase Plan, towards the purchase of shares of PDF common stock at a price of 85% of the lower of the fair market value at the beginning of the offering period or the end of the purchase period. The 2021 Purchase Plan commenced on August 1, 2021, and provided for twenty-four-month offering periods with four six-month purchase periods in each offering period.

The Company estimated the fair value of purchase rights granted under the 2021 Purchase Plan during the period using the Black-Scholes-Merton option-pricing model with the following weighted average assumptions, resulting in the following weighted average fair values:

	*Nine Months Ended September 30,*
	*2025*			*2024*
Expected life (in years)		1.25			1.25
Volatility		44.70	%		40.97	%
Risk-free interest rate		4.07	%		4.61	%
Expected dividend		—			—
Weighted average fair value of purchase rights granted during the period	$	8.78		$	10.91

During the nine months ended September 30, 2025 and 2024, a total of 197,414 shares and 81,974 shares, respectively, were issued under the 2021 Purchase Plan, at a weighted average purchase price of $21.08 per share and $26.31 per share, respectively. As of September 30, 2025, unrecognized compensation cost related to the 2021 Purchase Plan was $3.2 million, which is expected to be recognized over a weighted average period of 1.8 years.

As of September 30, 2025, 641,067 shares were available for future issuance under the 2021 Purchase Plan.

Stock Incentive Plan

On November 16, 2011, the Company’s stockholders initially approved the 2011 Stock Incentive Plan, which has been amended and restated by the Board of Directors and approved by the Company’s stockholders a number of times since then (as amended through the date of this report, the “2011 Plan”). Under the 2011 Plan, the Company may award stock options, stock appreciation rights (“SARs”), stock grants or stock units covering shares of the Company’s common stock to employees, directors, non-employee directors and contractors. The aggregate number of shares reserved for awards under the 2011 Plan is 15.9 million shares, plus up to 3.5 million shares previously issued under the 2001 Stock Plan adopted by the Company in 2001, which expired in 2011 (the “2001 Plan”) that are either (i) forfeited or (ii) repurchased by the Company or are shares subject to awards previously issued under the 2001 Plan that expire or that terminate without having been exercised or settled in full on or after November 16, 2011. In case of awards other than options or SARs, the aggregate number of shares reserved under the 2011 Plan will be decreased at a rate of 1.33 shares issued pursuant to such awards. The exercise price for stock options must generally be at prices no less than the fair market value at the date of grant. Stock options generally expire ten years from the date of grant and become vested and exercisable over a four-year period.

As of September 30, 2025, 15.9 million shares of common stock were reserved to cover stock-based awards under the 2011 Plan, of which 3.2 million shares were available for future grant. The number of shares reserved and available under the 2011 Plan includes 0.5 million shares that were subject to awards previously made under the 2001 Plan and were forfeited, expired, or repurchased by the Company after the adoption of the 2011 Plan through September 30, 2025. As of September 30, 2025, there were no outstanding awards that had been granted outside of the 2011 Plan.

The Company estimated the fair value of share-based awards granted under the 2011 Stock Plan during the period using the Black-Scholes-Merton option-pricing model. There were no stock options granted during the nine months ended September 30, 2025 and 2024.

Stock-Based Compensation

Stock-based compensation is estimated at the grant date based on the award’s fair value and is recognized on a straight-line basis over the vesting periods, generally four years. Stock-based compensation expense before taxes related to the Company’s stock plan and employee stock purchase plan was allocated as follows (in thousands):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Costs of revenues	$	1,274	$	1,366	$	3,873	$	3,751
Research and development		2,204		2,375		6,874		6,640
Selling, general, and administrative		2,786		2,989		8,312		8,149
Total stock-based compensation expense	$	6,264	$	6,730	$	19,059	$	18,540

Stock Award Activities

Restricted stock unit (“RSU”)

Nonvested RSU activities were as follows:

				*Weighted*
				*Average Grant*
	*Shares*			*Date Fair Value*
	*(in thousands)*			*Per Share*
Nonvested, January 1, 2025		1,885		$	33.14
Granted		955			21.85
Vested		(761	)		29.58
Forfeited		(68	)		32.63
Nonvested, September 30, 2025		2,011		$	29.14

The weighted average grant date fair values of RSUs granted during the nine months ended September 30, 2025 and 2024 were $21.85 and $35.42, respectively.

The total fair value of RSUs vested were as follows (in thousands):

	*Nine Months Ended September 30,*
	*2025*		*2024*
Fair value of restricted stock units vested	$	18,232	$	25,483

As of September 30, 2025, there was $49.1 million of total unrecognized compensation cost related RSUs which is expected to be recognized over a weighted average period of 2.8 years. RSUs do not have rights to dividends prior to vesting.

Stock Options

As of September 30, 2025, the outstanding stock options totaled 20,761 shares. Total fair value of shares vested during the nine months ended September 30, 2025 was immaterial. As of September 30, 2025, there was no remaining unrecognized compensation cost related to unvested stock options.

Note 3 - Balance Sheet Components - Schedule of Changes in Goodwill (Details)
$ in Thousands

9 Months Ended

Sep. 30, 2025

USD ($)

Balance at the beginning of period

$ 14,953

Addition (1)

81,799

^[1]

Foreign currency translation adjustment

Balance at the end of period

$ 96,780

[1]	The Company completed the acquisition of SecureWise LLC (“SecureWise”) on March 7, 2025. See Note 14, Business Combination, for additional information related to the goodwill and intangible assets added from this acquisition.

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
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-URI https://asc.fasb.org/1943274/2147482548/350-20-55-24

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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-URI https://asc.fasb.org/1943274/2147479303/805-10-55-41

Reference 4: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147478064/805-740-55-13

Reference 5: http://www.xbrl.org/2003/role/exampleRef
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-URI https://asc.fasb.org/1943274/2147479303/805-10-55-39

Reference 6: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147482785/280-10-55-49

Reference 7: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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-Paragraph 100
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 8: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(15))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482598/350-20-45-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-4

+ Details

Note 4 - Leases - Lease Cost (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2025

Sep. 30, 2024

Sep. 30, 2025

Sep. 30, 2024

Dec. 31, 2024

Operating lease expense

$ 458

$ 401

$ 1,307

$ 1,161

Short-term lease and variable lease expense (1)

^[1]

190

268

590

754

Total lease expense

$ 648

$ 669

$ 1,897

$ 1,915

Weighted average remaining lease term under operating leases (in years) (Year)

3 years 4 months 24 days

3 years 3 months 18 days

Weighted average discount rate for operating lease liabilities

6.20%

6.00%

[1]

Leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets, and the Company recognizes lease expense for these leases on a straight-line basis over the lease term. Variable lease expense for the periods presented primarily included common area maintenance charges.

Note 10 - Customer and Geographic Information - Long-lived Assets by Geographic Area (Details) - USD ($)
$ in Thousands

Sep. 30, 2025

Dec. 31, 2024

Long-lived assets, net

$ 88,027

$ 60,243

UNITED STATES

Long-lived assets, net

^[1]

85,110

58,782

Non-US [Member]

Long-lived assets, net

$ 2,917

$ 1,461

[1]	Includes assets deployed at customer sites which could be outside the U.S.

Note 3 - Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property and equipment, gross	$ 121,305	$ 95,416
Less: Accumulated depreciation and amortization	(49,384)	(46,951)
Total property and equipment, net	71,921	48,465
Computer Equipment [Member]
Property and equipment, gross	13,900	10,799
Software and Software Development Costs [Member]
Property and equipment, gross	6,352	5,617
Furniture and Fixtures [Member]
Property and equipment, gross	2,610	2,529
Leasehold Improvements [Member]
Property and equipment, gross	7,023	6,691
Laboratory and Test Equipment [Member]
Property and equipment, gross	6,580	5,734
Test Equipment [Member]
Property and equipment, gross	30,421	22,680
Property, Plant and Equipment in Progress, DFI System Asset [Member]
Property and equipment, gross	43,396	34,935
Property, Plant and Equipment in Progress, CV and Other Assets [Member]
Property and equipment, gross	$ 11,023	$ 6,431

Note 3 - Balance Sheet Components - Schedule of Net Investments in Sales-Type Leases (Details) - USD ($)
$ in Thousands

Sep. 30, 2025

Dec. 31, 2024

Present value of lease receivables

$ 13,870

$ 13,238

Less: Contract liability

(3,235)

Net lease receivables

13,870

10,003

Unguaranteed residual assets

10,946

7,749

Total net investments in sales-type leases

24,816

17,752

Net investments in sales-type leases - current portion

9,713

4,526

Net investments in sales-type leases (3)

^[1]

$ 15,103

$ 13,226

[1]	The Company’s net investments in sales-type leases were for its DFI™ system and CV® system assets. The components of net investments in sales-type leases were as follows (in thousands):

Note 7 - Employee Benefit Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended		166 Months Ended
	Aug. 01, 2021	Nov. 16, 2011	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)					0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)			20,761		20,761
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 0		$ 0
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 49,100		$ 49,100
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 9 months 18 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 21.85	$ 35.42
The 2021 Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	85.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Month)	24 months
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)		3,500,000	197,414	81,974
Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased (in dollars per share)			$ 21.08	$ 26.31	$ 21.08
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 3,200		$ 3,200
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 9 months 18 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			641,067		641,067
The 2011 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			3,200,000		3,200,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)		15,900,000
Share Based Compensation Arrangement By Share Based Payment Award Shares Reserved Decrease Rate (in shares)		1.33
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		500,000	15,900,000		15,900,000
The 2011 Plan [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Month)		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		4 years

Note 10 - Customer and Geographic Information (Details Textual)	9 Months Ended
	Sep. 30, 2025
Number of Operating Segments	1
Number of Reportable Segments	1

Note 4 - Leases (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	$ 0	$ 0
Finance Lease, Liability	$ 0	$ 0

Note 14 - Business Combination

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Business Combination [Text Block]

14. BUSINESS COMBINATION

On February 19, 2025, the Company entered into an Equity Purchase Agreement (the “Purchase Agreement”) with Telit IOT Solutions Inc., a Delaware corporation (the “Seller”), and SecureWise, pursuant to which the Company agreed to acquire the Seller’s SecureWise business (the “Business”) by means of a purchase of all of the outstanding equity interests of SecureWise held by the Seller (the “Transaction”).

On March 7, 2025, the Company completed the acquisition of the Business from the Seller pursuant to the Purchase Agreement for a cash purchase price of $130.0 million, subject to customary adjustments in respect of indebtedness, transaction expenses, cash and working capital of the Business, in each case, in accordance with the terms of the Purchase Agreement. The Company financed the Transaction using a combination of cash on hand and borrowings under the Credit Facilities.

The Company expects the Transaction to accelerate equipment makers’ ability to derive value from equipment data by enabling them to leverage the Company’s Exensio analytics software and to expand the capability of the Company’s secure data exchange (“DEX”) outsourced semiconductor assembly and test (“OSAT”) network by allowing equipment makers, fab operators, and fabless companies to collaborate to optimize chip manufacturing and test.

The Company accounted for the Transaction as a business combination in accordance with ASC Topic 805, Business Combinations. This method requires that assets acquired and liabilities assumed in a business combination be recognized at their respective estimated fair values as of the acquisition date. The Company allocated the purchase price to identifiable assets acquired based on their estimated fair values. The fair value of the consideration transferred and the assets acquired and liabilities assumed was determined by the Company and in doing so management engaged a third-party valuation specialist to assist with the measurement of the fair value of identifiable intangible assets. The estimated fair value of the identifiable assets acquired and liabilities assumed was based on management’s best estimates. The fair value of the customer relationships was determined using the multi-period excess earnings income approach or cost approach. The fair value of trade names and developed technology was determined using the relief-from-royalty method. The fair value of acquired technology was determined using the cost approach. The excess of purchase consideration over the fair value of net tangible and identifiable intangible assets acquired was recorded as goodwill. The goodwill recorded from this acquisition represents business benefits the Company anticipates from the acquired workforce and expectation for expanded sales opportunities to foster further business growth. The goodwill associated with the acquisition is deductible for tax purposes.

The Company expensed all transaction costs in the period in which they were incurred. The total acquisition-related and integration costs related to the acquisition of SecureWise amounted to $5.5 million, of which $4.6 million was recorded in the nine months ended September 30, 2025, and $0.9 million in the fourth quarter of 2024.

The preliminary allocation of the purchase price for the acquisition of SecureWise, as of the date of the completion of the Transaction, is as follows (in thousands, except amortization period):

				*Amortization*
	*Amount*			*Period (Years)*
Allocation of Purchase Price:
Fair value estimates of assets acquired and liabilities assumed
Cash	$	1,049
Accounts receivable		2,969
Prepaid and other assets		1,049
Fixed assets		1,592
Fair value of intangible assets:
Trademark		6,600		5
Customer relationships		28,900		13
Developed technology		11,600		7
Goodwill		81,799		N/A
Accounts payable and other current liabilities		(4,791	)
Total purchase price allocation	$	130,767

The estimated fair value of the accounts receivable acquired approximates the contractual value of $3.0 million.

The Company is still finalizing the allocation of the purchase price to the individual assets acquired. Accordingly, these preliminary estimates are subject to change during the measurement period, which is the period subsequent to the acquisition date during which the acquirer may adjust the provisional amounts recognized for a business combination, not to exceed one year from the acquisition date. The final purchase price allocation, which may include changes in the allocations within intangible assets and between intangible assets and goodwill, as well as changes in the estimated useful lives of the intangible assets, will be determined when the Company has completed the detailed review of underlying inputs and assumptions used in its preliminary purchase price allocation.

Pro forma information reflecting the impact of the Transaction has not been presented as the Transaction was not material to the Company’s financial results.

- Definition

The entire disclosure for business combination.

+ References

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+ Details

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 31, 2023	38,289
Balances at Dec. 31, 2023	$ 6	$ 473,295	$ (143,923)	$ (98,045)	$ (2,387)	$ 228,946
Balances (in shares) at Dec. 31, 2023			11,460
Shares issued under equity plans (in shares)	306		0
Shares issued under equity plans	$ 0	1,941	$ 0	0	0	1,941
Shares withheld for taxes related to shares issued under equity plans (in shares)	0		118
Shares withheld for taxes related to shares issued under equity plans	$ 0	0	$ (3,794)	0	0	(3,794)
Stock-based compensation expense	0	6,154	0	0	0	6,154
Comprehensive income (loss)	$ 0	0	$ 0	(393)	(542)	(935)
Repurchase of common stock (in shares)	202		202
Repurchase of common stock	$ 0	0	$ (6,899)	0	0	(6,899)
Balances (in shares) at Mar. 31, 2024	38,393
Balances at Mar. 31, 2024	$ 6	481,390	$ (154,616)	(98,438)	(2,929)	225,413
Balances (in shares) at Mar. 31, 2024			11,780
Repurchase of common stock (in shares)	(202)		(202)
Balances (in shares) at Dec. 31, 2023	38,289
Balances at Dec. 31, 2023	$ 6	473,295	$ (143,923)	(98,045)	(2,387)	228,946
Balances (in shares) at Dec. 31, 2023			11,460
Comprehensive income (loss)						3,653
Balances (in shares) at Sep. 30, 2024	38,763
Balances at Sep. 30, 2024	$ 6	496,255	$ (159,018)	(94,527)	(2,252)	240,464
Balances (in shares) at Sep. 30, 2024			11,905
Balances (in shares) at Mar. 31, 2024	38,393
Balances at Mar. 31, 2024	$ 6	481,390	$ (154,616)	(98,438)	(2,929)	225,413
Balances (in shares) at Mar. 31, 2024			11,780
Shares issued under equity plans (in shares)	38		0
Shares issued under equity plans	$ 0	67	$ 0	0	0	67
Shares withheld for taxes related to shares issued under equity plans (in shares)	0		13
Shares withheld for taxes related to shares issued under equity plans	$ 0	0	$ (468)	0	0	(468)
Stock-based compensation expense	0	5,762	0	0	0	5,762
Comprehensive income (loss)	$ 0	0	0	1,705	(326)	1,379
Balances (in shares) at Jun. 30, 2024	38,431
Balances at Jun. 30, 2024	$ 6	487,219	$ (155,084)	(96,733)	(3,255)	232,153
Balances (in shares) at Jun. 30, 2024			11,793
Shares issued under equity plans (in shares)	332		0
Shares issued under equity plans	$ 0	2,179	$ 0	0	0	2,179
Shares withheld for taxes related to shares issued under equity plans (in shares)	0		112
Shares withheld for taxes related to shares issued under equity plans	$ 0	0	$ (3,934)	0	0	(3,934)
Stock-based compensation expense	0	6,857	0	0	0	6,857
Comprehensive income (loss)	$ 0	0	0	2,206	1,003	3,209
Balances (in shares) at Sep. 30, 2024	38,763
Balances at Sep. 30, 2024	$ 6	496,255	$ (159,018)	(94,527)	(2,252)	240,464
Balances (in shares) at Sep. 30, 2024			11,905
Balances (in shares) at Dec. 31, 2024	38,801
Balances at Dec. 31, 2024	$ 6	502,902	$ (159,352)	(93,988)	(3,531)	$ 246,037
Balances (in shares) at Dec. 31, 2024			11,916			11,916
Shares issued under equity plans (in shares)	329		0
Shares issued under equity plans	$ 0	2,128	$ 0	0	0	$ 2,128
Shares withheld for taxes related to shares issued under equity plans (in shares)	0		124
Shares withheld for taxes related to shares issued under equity plans	$ 0	0	$ (3,320)	0	0	(3,320)
Stock-based compensation expense	0	6,715	0	0	0	6,715
Comprehensive income (loss)	$ 0	0	0	(3,032)	452	(2,580)
Balances (in shares) at Mar. 31, 2025	39,130
Balances at Mar. 31, 2025	$ 6	511,745	$ (162,672)	(97,020)	(3,079)	248,980
Balances (in shares) at Mar. 31, 2025			12,040
Balances (in shares) at Dec. 31, 2024	38,801
Balances at Dec. 31, 2024	$ 6	502,902	$ (159,352)	(93,988)	(3,531)	$ 246,037
Balances (in shares) at Dec. 31, 2024			11,916			11,916
Comprehensive income (loss)						$ 911
Balances (in shares) at Sep. 30, 2025	39,507
Balances at Sep. 30, 2025	$ 6	526,526	$ (165,542)	(94,580)	(2,028)	$ 264,382
Balances (in shares) at Sep. 30, 2025			12,175			12,175
Balances (in shares) at Mar. 31, 2025	39,130
Balances at Mar. 31, 2025	$ 6	511,745	$ (162,672)	(97,020)	(3,079)	$ 248,980
Balances (in shares) at Mar. 31, 2025			12,040
Shares issued under equity plans (in shares)	33		0
Shares issued under equity plans	$ 0	27	$ 0	0	0	27
Shares withheld for taxes related to shares issued under equity plans (in shares)	0		11
Shares withheld for taxes related to shares issued under equity plans	$ 0	0	$ (215)	0	0	(215)
Stock-based compensation expense	0	6,283	0	0	0	6,283
Comprehensive income (loss)	$ 0	0	0	1,146	1,299	2,445
Balances (in shares) at Jun. 30, 2025	39,163
Balances at Jun. 30, 2025	$ 6	518,055	$ (162,887)	(95,874)	(1,780)	257,520
Balances (in shares) at Jun. 30, 2025			12,051
Shares issued under equity plans (in shares)	357		0
Shares issued under equity plans	$ 0	2,088	$ 0	0	0	2,088
Shares withheld for taxes related to shares issued under equity plans (in shares)	0		111
Shares withheld for taxes related to shares issued under equity plans	$ 0	0	$ (2,411)	0	0	(2,411)
Stock-based compensation expense	0	6,383	0	0	0	6,383
Comprehensive income (loss)	$ 0	0	$ 0	1,294	(248)	1,046
Repurchase of common stock (in shares)	(13)		13
Repurchase of common stock	$ 0	0	$ (244)	0	0	(244)
Balances (in shares) at Sep. 30, 2025	39,507
Balances at Sep. 30, 2025	$ 6	$ 526,526	$ (165,542)	$ (94,580)	$ (2,028)	$ 264,382
Balances (in shares) at Sep. 30, 2025			12,175			12,175
Repurchase of common stock (in shares)	13		(13)

Note 2 - Revenue From Contracts With Customers 1 (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Capitalized Contract Cost, Impairment Loss			$ 0		$ 0
Revenue, Remaining Performance Obligation, Amount	$ 292,000		292,000
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 1,000	$ (700)	$ 200	$ (1,400)
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member]
Concentration Risk, Percentage	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member] \| Non-US [Member]
Concentration Risk, Percentage	47.00%	55.00%	57.00%	55.00%

- Definition

+ References + Details

Note 1 - Basis of Presentation and Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Basis of Presentation and Significant Accounting Policies [Text Block]

1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The interim unaudited condensed consolidated financial statements included herein have been prepared by PDF Solutions, Inc. (the “Company”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), including the instructions to the Quarterly Report on Form 10‑Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted. The interim unaudited condensed consolidated financial statements reflect, in the opinion of management, all adjustments necessary (consisting only of normal recurring adjustments) to present a fair statement of results for the interim periods presented. The operating results for any interim period are not necessarily indicative of the results that may be expected for other interim periods or the full fiscal year. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2024, filed with the SEC on February 27, 2025.

The interim unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries after the elimination of all intercompany balances and transactions.

The condensed consolidated balance sheet as of December 31, 2024 has been derived from the audited consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in these condensed consolidated financial statements include revenue recognition, the estimated useful lives of property and equipment and intangible assets, fair value of convertible note receivable, assumptions made in analysis of allowance for credit losses, impairment of goodwill and long-lived assets, realization of deferred tax assets (“DTAs”), and accounting for lease obligations, stock-based compensation expense, and income tax uncertainties and contingencies. Actual results could differ from those estimates and may result in material effects on the Company’s operating results and financial position.

Reclassification of Prior Period Amount

Certain immaterial prior period amounts on the condensed consolidated balance sheet, condensed consolidated statements of stockholders' equity, and condensed consolidated statements of cash flows have been reclassified to conform with current period presentation.

Recent Accounting Standards

In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU is intended to improve the transparency of income tax disclosures by requiring (1) consistent categories and greater disaggregation of information in the rate reconciliation and (2) income taxes paid disaggregated by jurisdiction. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The ASU’s amendments are effective for public business entities for annual periods beginning after December 15, 2024. Entities are permitted to early adopt the standard for “annual financial statements that have not yet been issued or made available for issuance.” This ASU may be applied either prospectively or retrospectively. The Company will adopt this ASU on a prospective basis. The Company is currently evaluating the impact of the new standard on the consolidated financial statements and related disclosures.

In November 2024, the FASB issued ASU No. 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. This ASU requires the disaggregation of certain expenses in the notes to the consolidated financial statements, to provide enhanced transparency into the expense captions presented on the face of the income statement. Additionally, in January 2025, FASB issued ASU 2025-01, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date to clarify the effective date of ASU 2024-03. This ASU is effective for annual periods beginning after December 15, 2026 and for interim periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact of the new standard on the consolidated financial statements and related disclosures.

In July 2025, the FASB issued ASU 2025-05, Measurement of Credit Losses for Accounts Receivable and Contract Assets, which provides a practical expedient to measure credit losses on accounts receivable and contract assets. The ASU is effective for annual periods beginning after December 15, 2025, and interim periods within those annual reporting periods. Early adoption is permitted. The Company is currently evaluating the timing of the adoption and the impact of the new standard on the consolidated financial statements and related disclosures.

In September 2025, the FASB issued ASU 2025-06, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40), related to accounting for internal-use software costs. The amendments in this ASU improve the operability of the guidance by removing all references to software development project stages so that the guidance is neutral to different software development methods. This update is effective for annual periods beginning after December 15, 2027, including interim periods within those fiscal years, though early adoption is permitted. The Company is currently evaluating the effects of the new standard on the consolidated financial statements and related disclosures.

Management has reviewed other recently issued accounting pronouncements issued or proposed by the FASB and does not believe any of these accounting pronouncements has had or will have a material impact on the condensed consolidated financial statements.

Note 12 - Commitments and Contingencies

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Commitments and Contingencies Disclosure [Text Block]

12. COMMITMENTS AND CONTINGENCIES

Strategic Partnership with Advantest — See Note 13, Strategic Partnership Agreement with Advantest and Related Party Transactions, for the discussion about the Company’s commitments under the strategic partnership with Advantest.

Operating Leases — Refer to Note 4, Leases, for the discussion about the Company’s lease commitments.

Indemnifications — The Company generally provides a warranty to its customers that its software will perform substantially in accordance with documented specifications typically for a period of 90 days following initial delivery of its products. The Company also indemnifies certain customers from third-party claims of intellectual property infringement relating to the use of its products. Historically, costs related to these guarantees have not been significant. The Company is unable to estimate the maximum potential impact of these guarantees on its future results of operations.

The Company’s standard product warranty terms for the sale of its DFI system product generally include post-sales support and repairs or replacement of a product at no additional charge for a contractually agreed period of time. The standard warranty reserve is based on estimated total expected costs to fulfill our warranty obligation based on best available information as of the reporting date. The standard warranty reserve was immaterial as of September 30, 2025, and December 31, 2024.

Purchase Obligations — The Company has purchase obligations with certain suppliers for the purchase of goods and services entered into in the ordinary course of business. As of September 30, 2025, total outstanding purchase obligations were $39.3 million, the majority of which is due within the next 12 months.

Indemnification of Officers and Directors — As permitted by the Delaware General Corporation Law, the Company has included a provision in its certificate of incorporation to eliminate the personal liability of its officers and directors for monetary damages for breach or alleged breach of their fiduciary duties as officers or directors.

In addition, the Bylaws of the Company provide that the Company is required to indemnify its officers and directors even when indemnification would otherwise be discretionary, and the Company is required to advance expenses to its officers and directors as incurred in connection with proceedings against them for which they may be indemnified. The Company has entered into indemnification agreements with its officers and directors containing provisions that are in some respects broader than the specific indemnification provisions contained in the Delaware General Corporation Law. The indemnification agreements require the Company to indemnify its officers and directors against liabilities that may arise by reason of their status or service as officers and directors other than for liabilities arising from willful misconduct of a culpable nature, to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified, and to obtain directors’ and officers’ insurance if available on reasonable terms. The Company has obtained directors’ and officers’ liability insurance in amounts comparable to other companies of the Company’s size and in the Company’s industry. Since a maximum obligation of the Company is not explicitly stated in the Company’s Bylaws or in its indemnification agreements and will depend on the facts and circumstances that arise out of any future claims, the overall maximum amount of the obligations cannot be reasonably estimated.

Legal Proceedings — From time to time, the Company is subject to various claims and legal proceedings that arise in the ordinary course of business. The Company accrues for losses related to litigation when a potential loss is probable, and the loss can be reasonably estimated in accordance with FASB requirements. As of September 30, 2025, the Company was not party to any material legal proceedings for which a loss was probable or an amount was accrued. From time to time, the Company may enter into contingent fee arrangements with external legal firms that may represent the Company in legal proceedings related to disputes. Contingent legal fees are accrued by the Company when they are probable and reasonably estimable.

On May 6, 2020, the Company initiated an arbitration proceeding with the Hong Kong International Arbitration Center (the “Tribunal”) against SMIC New Technology Research & Development (Shanghai) Corporation (“SMIC”) due to SMIC’s failure to pay fees due to the Company under a series of contracts. The Company seeks to recover the unpaid fees, a declaration requiring SMIC to pay fees under the contracts in the future (or a lump sum payment to end the contract), and costs associated with bringing the arbitration proceeding. SMIC denies liability and an arbitration hearing was held in February 2023. Final written submissions were submitted by the parties at the end of August 2023, and the parties submitted answers to the Tribunal’s final questions in August 2024. The Company is awaiting the Tribunal’s decision on a judgment.

Note 13 - Strategic Partnership Agreement With Advantest and Related Party Transactions (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Revenue from Contract with Customer, Including Assessed Tax		$ 57,115	$ 46,409	$ 156,621	$ 129,380
Contract with Customer, Liability		22,116		22,116		$ 26,517
Analytics [Member]
Revenue from Contract with Customer, Including Assessed Tax		54,662	44,750	145,955	121,327
Advantest [Member] \| Strategic Partnership [Member]
Stock Issued During Period, Shares, New Issues (in shares)	3,306,924
Proceeds from Issuance of Common Stock	$ 65,200
Long-Term Purchase Commitment, Period (Year)	5 years
Advantest [Member] \| Strategic Partnership [Member] \| Analytics [Member]
Revenue from Contract with Customer, Including Assessed Tax		1,400	$ 3,300	8,500	$ 9,200
Contract with Customer, Liability		$ 1,000		$ 1,000		$ 8,300

- Definition

+ References

+ Details

Note 12 - Commitments and Contingencies (Details Textual) $ in Millions	Sep. 30, 2025 USD ($)
Purchase Obligation	$ 39.3

Note 7 - Employee Benefit Plans - Schedule of Restricted Stock Unit Fair Value (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Restricted Stock Units (RSUs) [Member]
Fair value of restricted stock units vested	$ 18,232	$ 25,483

Note 3 - Balance Sheet Components

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Supplemental Balance Sheet Disclosures [Text Block]

3. BALANCE SHEET COMPONENTS

Accounts Receivable

Accounts receivable include amounts that are unbilled at the end of the period that are expected to be billed and collected within a 12‑month period. Unbilled accounts receivable, included in accounts receivable, totaled $39.8 million and $23.0 million as of September 30, 2025, and December 31, 2024, respectively. Unbilled accounts receivable that are not expected to be billed and collected during the succeeding 12‑month period are recorded in other non-current assets and totaled $10.6 million and $9.0 million as of September 30, 2025, and December 31, 2024, respectively.

The Company performs ongoing credit evaluations of its customers’ financial condition. An allowance for credit losses is maintained for probable credit losses based upon the Company’s assessment of the expected collectibility of the accounts receivable. The allowance for credit losses is reviewed on a quarterly basis to assess the adequacy of the allowance. The allowance for credit losses was $0.9 million as of September 30, 2025 and December 31, 2024.

Prepaid expenses and other current assets

Prepaid expenses and other current assets consist of the following (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
Prepaid expense	$	8,554	$	6,481
Contract assets		11,361		3,224
Costs capitalized to obtain revenue contracts		2,358		2,929
Net investments in sales-type leases - current portion		9,713		4,526
Income tax receivable		1,193		285
Convertible note receivable (1)		2,113		—
Total prepaid expenses and other current assets	$	35,292	$	17,445

(1)

See Note 11, Fair Value Measurements.

Property and Equipment

Property and equipment, net consist of the following (in thousands):

	*September 30,*			*December 31,*
	*2025*			*2024*
Computer equipment	$	13,900		$	10,799
Software and capitalized software development cost		6,352			5,617
Furniture, fixtures, and equipment		2,610			2,529
Leasehold improvements		7,023			6,691
Laboratory and other equipment		6,580			5,734
Test equipment		30,421			22,680
Property and equipment in progress:
DFI system assets		43,396			34,935
CV system and other assets		11,023			6,431
Total property and equipment		121,305			95,416
Less: Accumulated depreciation and amortization		(49,384	)		(46,951	)
Total property and equipment, net	$	71,921		$	48,465

Test equipment mainly includes DFI™ system and CV® system assets at customer sites that are contributing to revenue. Property and equipment in progress represent mainly the development or construction of property and equipment that have not yet been placed in service for the Company’s intended use and are not depreciated.

Depreciation and amortization expense was $1.1 million and $0.8 million for the three months ended September 30, 2025 and 2024, respectively, and $2.6 million and $2.9 million for the nine months ended September 30, 2025 and 2024, respectively.

Goodwill and Intangible Assets, Net

The changes in goodwill were as follows (in thousands):

	*Nine Months Ended September 30,*
	*2025*
Balance at the beginning of period	$	14,953
Addition (1)		81,799
Foreign currency translation adjustment		28
Balance at the end of period	$	96,780

(1)

The Company completed the acquisition of SecureWise LLC (“SecureWise”) on March 7, 2025. See Note 14, Business Combination, for additional information related to the goodwill and intangible assets added from this acquisition.

Intangible assets, net, consisted of the following (in thousands):

		*September 30, 2025*							*December 31, 2024*
	*Amortization*	*Gross*					*Net*		*Gross*					*Net*
	*Period*	*Carrying*		*Accumulated*			*Carrying*		*Carrying*		*Accumulated*			*Carrying*
	*(Years)*	*Amount*		*Amortization*			*Amount*		*Amount*		*Amortization*			*Amount*
Acquired intangible assets:
Customer relationships	1 - 13	$	38,402	$	(9,383	)	$	29,019	$	9,499	$	(7,866	)	$	1,633
Developed technology	4 - 9		46,198		(27,418	)		18,780		34,566		(24,601	)		9,965
Tradename and trademarks	2 - 10		8,198		(1,917	)		6,281		1,598		(1,120	)		478
Patent	6 - 10		2,100		(1,934	)		166		2,100		(1,869	)		231
Noncompetition agreements	3		848		(848	)		—		848		(848	)		—
Total		$	95,746	$	(41,500	)	$	54,246	$	48,611	$	(36,304	)	$	12,307

The weighted average amortization period for acquired identifiable intangible assets was 8.8 years as of September 30, 2025. The amortization expense related to intangible assets were as follows (in thousands):

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Amortization of acquired technology (included in costs of revenues)	$	998	$	584	$	2,674	$	1,752
Amortization of acquired intangible assets (presented separately under costs and expenses)		1,069		196		2,515		714
Total amortization expense	$	2,067	$	780	$	5,189	$	2,466

The estimated future amortization of acquired identifiable intangible assets were as follows (in thousands):

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	2,066
2026		8,095
2027		7,943
2028		7,637
2029		5,952
2030 and thereafter		22,553
Total future amortization expense	$	54,246

There was no impairment charges for goodwill and intangible assets during the three and nine months ended September 30, 2025 and 2024.

Other Non-current Assets

Other non-current assets consisted of the following (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
Net investments in sales-type leases (3)	$	15,103	$	13,226
Unbilled accounts receivable (2)		10,576		8,983
Costs capitalized to obtain revenue contracts (1)		4,257		2,385
Contract assets (1)		108		617
Other		1,924		4,302
Total other non-current assets	$	31,968	$	29,513

(1)

See Note 2, Revenue from Contracts with Customers.

(2)

See Note 3, Balance Sheet Components – Accounts Receivable.

(3)

The Company’s net investments in sales-type leases were for its DFI system and CV system assets. The components of net investments in sales-type leases were as follows (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
Present value of lease receivables	$	13,870	$	13,238
Less: Contract liability		—		(3,235	)
Net lease receivables		13,870		10,003
Unguaranteed residual assets		10,946		7,749
Total net investments in sales-type leases	$	24,816	$	17,752
Reported as:
Current (included in Prepaid expenses and other current assets)	$	9,713	$	4,526
Non-current (included in Other non-current assets)		15,103		13,226
Total net investments in sales-type leases	$	24,816	$	17,752

Maturities of leases payments under sales-type leases as of September 30, 2025, were as follows (in thousands):

Year Ending December 31,	*Amount*
2025 (remaining three months)	$	2,201
2026		9,601
2027		2,101
2028		10
2029 and thereafter		49
Total future sales-type lease payments		13,962
Less: Present value adjustment (1)		(92	)
Present value of lease receivables	$	13,870

(1)

Calculated using the rate implicit in the lease determined for each lease.

There was no allowance for credit losses on lease receivables as of September 30, 2025, and December 31, 2024. The Company’s ongoing risk management strategy for residual assets includes performing regular reviews of estimated residual values.

Accrued and other current liabilities

Accrued and other current liabilities consisted of the following (in thousands):

	*September 30,*		*December 31,*
	*2025*		*2024*
Accrued expenses	$	7,021	$	7,156
Accrued income taxes		213		365
Other		1,427		1,231
Total accrued and other current liabilities	$	8,661	$	8,752

Note 10 - Customer and Geographic Information - Revenues by Geographic Area (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 57,115,000	$ 46,409,000	$ 156,621,000	$ 129,380,000
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member]
Concentration risk	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| UNITED STATES
Revenues	$ 30,143,000	$ 21,065,000	$ 68,325,000	$ 58,021,000
Concentration risk	53.00%	45.00%	43.00%	45.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| JAPAN
Revenues	$ 10,091,000	$ 6,275,000	$ 31,131,000	$ 25,495,000
Concentration risk	18.00%	14.00%	20.00%	20.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| CHINA
Revenues	$ 5,842,000	$ 5,673,000	$ 26,075,000	$ 17,526,000
Concentration risk	10.00%	12.00%	17.00%	14.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| TAIWAN
Revenues	$ 1,238	$ 6,273	$ 4,235	$ 8,107
Concentration risk	2.00%	14.00%	3.00%	6.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| Other Geographical Areas [Member]
Revenues	$ 9,801,000	$ 7,123,000	$ 26,855,000	$ 20,231,000
Concentration risk	17.00%	15.00%	17.00%	15.00%

- Definition

+ References + Details

- Definition

+ References

+ Details

Note 2 - Revenue From Contracts With Customers - Schedule of Contract Balances (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2025

Sep. 30, 2024

Sep. 30, 2025

Sep. 30, 2024

Dec. 31, 2024

Current (included in Prepaid expenses and other current assets)

$ 11,361

$ 3,224

Non-current (included in Other non-current assets)

^[1]

108

617

Total contract assets

11,469

3,841

Deferred revenues – current portion

21,247

25,005

Non-current (included in Other non-current liabilities)

869

1,512

Total deferred revenues

22,116

$ 26,517

Revenue recognized that was included in the deferred revenues and billings in excess of recognized revenues balances at the beginning of each period

$ 10,542

$ 12,040

$ 23,516

$ 24,669

[1]	See Note 2, Revenue from Contracts with Customers.

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues:
Revenues	$ 57,115	$ 46,409	$ 156,621	$ 129,380
Costs and Expenses:
Costs of revenues	15,840	12,484	43,681	38,243
Research and development	15,435	13,516	44,976	39,149
Selling, general, and administrative	19,944	18,094	63,060	50,851
Amortization of acquired intangible assets	1,069	196	2,515	714
Income from operations	4,827	2,119	2,389	423
Interest expense	(1,238)	0	(2,791)	0
Income before income tax expense	3,487	3,630	562	5,105
Net income (loss)	1,294	2,206	(592)	3,518
Other income (expense), net	(102)	1,511	964	4,682
Income tax expense	(2,193)	(1,424)	(1,154)	(1,587)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	(248)	975	1,512	123
Change in unrealized gain (loss) related to available-for-sale debt securities, net of tax	0	28	(9)	12
Total other comprehensive income (loss)	(248)	1,003	1,503	135
Comprehensive income	$ 1,046	$ 3,209	$ 911	$ 3,653
Net income (loss) per share:
Basic (in dollars per share)	$ 0.03	$ 0.06	$ (0.02)	$ 0.09
Diluted (in dollars per share)	$ 0.03	$ 0.06	$ (0.02)	$ 0.09
Weighted average common shares used to calculate net income (loss) per share:
Basic (in shares)	39,500	38,710	39,247	38,542
Diluted (in shares)	39,619	39,105	39,247	39,028
Analytics [Member]
Revenues:
Revenues	$ 54,662	$ 44,750	$ 145,955	$ 121,327
Integrated Yield Ramp [Member]
Revenues:
Revenues	$ 2,453	$ 1,659	$ 10,666	$ 8,053

Note 2 - Revenue From Contracts With Customers (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Disaggregation of Revenue [Table Text Block]

	*Three Months Ended September 30,*						*Nine Months Ended September 30,*
	*2025*			*2024*			*2025*			*2024*
Over time		80	%		64	%		71	%		67	%
Point-in-time		20	%		36	%		29	%		33	%
Total		100	%		100	%		100	%		100	%

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	*September 30,*		*December 31,*
	*2025*		*2024*
Current (included in Prepaid expenses and other current assets)	$	11,361	$	3,224
Non-current (included in Other non-current assets)		108		617
Total contract assets	$	11,469	$	3,841

	*September 30,*		*December 31,*
	*2025*		*2024*
Current	$	21,247	$	25,005
Non-current (included in Other non-current liabilities)		869		1,512
Total deferred revenues	$	22,116	$	26,517

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Revenue recognized that was included in the deferred revenues and billings in excess of recognized revenues balances at the beginning of each period	$	10,542	$	12,040	$	23,516	$	24,669

Capitalized Contract Cost [Table Text Block]

	*September 30,*		*December 31,*
	*2025*		*2024*
Current (included in Prepaid expenses and other current assets)	$	2,358	$	2,929
Non-current (included in Other non-current assets)		4,257		2,385
Total capitalized direct sales commission costs	$	6,615	$	5,314

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Amortization of capitalized direct sales commission costs	$	720	$	667	$	2,217	$	1,941

Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2025	Nov. 03, 2025
Document Information [Line Items]
Entity Central Index Key	0001120914
Entity Registrant Name	PDF SOLUTIONS INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2025
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	000-31311
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	25-1701361
Entity Address, Address Line One	2858 De La Cruz Blvd.
Entity Address, City or Town	Santa Clara
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95050
City Area Code	408
Local Phone Number	280-7900
Title of 12(b) Security	Common Stock, $0.00015 par value
Trading Symbol	PDFS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		39,512,959

Note 6 - Stockholders' Equity

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Equity [Text Block]

6. STOCKHOLDERS’ EQUITY

Stock Repurchase Program

On April 11, 2022, the Board of Directors adopted a stock repurchase program (the “2022 Program”) to repurchase up to $35.0 million of the Company’s common stock both on the open market and in privately negotiated transactions, including through Rule 10b5-1 plans, from time to time, over the next two years from the adoption date. During the nine months ended September 30, 2024, 201,561 shares were repurchased by the Company under the 2022 Program at an average price of $34.23 per share for an aggregate total price of $6.9 million. In total, the Company repurchased 937,501 shares under the 2022 Program at an average price of $25.96 per share for an aggregate total price of $24.3 million. The 2022 Program expired on April 11, 2024.

On April 15, 2024, the Board of Directors adopted a new stock repurchase program (the “2024 Program”) to repurchase up to $40.0 million of the Company’s common stock both on the open market and in privately negotiated transactions, including through Rule 10b5-1 plans, from time to time, over the next two years from the adoption date. During the nine months ended September 30, 2025, 12,500 shares were repurchased by the Company under the 2024 Program at an average price of $19.55 per share for an aggregate total price of $0.2 million. During the nine months ended September 30, 2024, the Company did not repurchase any shares under the 2024 Program. As of September 30, 2025, approximately $39.8 million remained available under the 2024 Program authorization.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Name Accounting Standards Codification
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-Paragraph 2
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-6

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
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-URI https://asc.fasb.org/505/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 13
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Name Accounting Standards Codification
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-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-16

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

+ Details

Note 11 - Fair Value Measurement - Schedule of Financial Assets (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands

Sep. 30, 2025

Dec. 31, 2024

Convertible note receivable (1)

^[1]

$ 2,113

$ 2,038

Total

6,507

92,542

Fair Value, Inputs, Level 1 [Member]

Convertible note receivable (1)

^[1]

Total

4,394

90,504

Fair Value, Inputs, Level 2 [Member]

Convertible note receivable (1)

^[1]

Total

Fair Value, Inputs, Level 3 [Member]

Convertible note receivable (1)

^[1]

2,113

2,038

Total

2,113

2,038

Money Market Funds [Member]

Money market mutual funds

4,394

66,213

Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]

Money market mutual funds

4,394

66,213

Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]

Money market mutual funds

Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]

Money market mutual funds

$ 0

US Government Debt Securities [Member]

U.S. Government securities (2)

^[2]

24,291

US Government Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]

U.S. Government securities (2)

^[2]

24,291

US Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]

U.S. Government securities (2)

^[2]

US Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]

U.S. Government securities (2)

^[2]

$ 0

[1]

In August 2024, the Company purchased a $2.0 million non-marketable convertible promissory note from an unrelated third party (the “convertible note”). The convertible note bears a 5% interest rate annually and will mature in August 2026.

[2]

The amortized cost of the Company’s investments in U.S. Government securities approximated their fair value due to their short-term maturities, and there have been no events or changes in circumstances that would have had a significant effect on the fair value of these securities in the periods presented. For the three and nine months ended September 30, 2025 and 2024, there were no material realized or unrealized gains or losses, either individually or in the aggregate.

Note 7 - Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	*Nine Months Ended September 30,*
	*2025*			*2024*
Expected life (in years)		1.25			1.25
Volatility		44.70	%		40.97	%
Risk-free interest rate		4.07	%		4.61	%
Expected dividend		—			—
Weighted average fair value of purchase rights granted during the period	$	8.78		$	10.91

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	*Three Months Ended September 30,*				*Nine Months Ended September 30,*
	*2025*		*2024*		*2025*		*2024*
Costs of revenues	$	1,274	$	1,366	$	3,873	$	3,751
Research and development		2,204		2,375		6,874		6,640
Selling, general, and administrative		2,786		2,989		8,312		8,149
Total stock-based compensation expense	$	6,264	$	6,730	$	19,059	$	18,540

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

				*Weighted*
				*Average Grant*
	*Shares*			*Date Fair Value*
	*(in thousands)*			*Per Share*
Nonvested, January 1, 2025		1,885		$	33.14
Granted		955			21.85
Vested		(761	)		29.58
Forfeited		(68	)		32.63
Nonvested, September 30, 2025		2,011		$	29.14

Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest [Table Text Block]

	*Nine Months Ended September 30,*
	*2025*		*2024*
Fair value of restricted stock units vested	$	18,232	$	25,483

Note 8 - Income Taxes

9 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Income Tax Disclosure [Text Block]

8. INCOME TAXES

Income tax expense decreased by $0.4 million for the nine months ended September 30, 2025, to $1.2 million as compared to $1.6 million income tax expense for the nine months ended September 30, 2024. The Company’s effective tax rate was 205% for the nine months ended September 30, 2025, compared to 31% for the nine months ended September 30, 2024. The increase was primarily due to changes in the foreign, federal and state taxes and year-to-date recognition of worldwide pre-tax income (loss) in relation to their forecasted amounts for the full year. The Company’s provision for income taxes for the nine months ended September 30, 2025, was primarily attributable to state and foreign taxes.

The Company’s total amount of unrecognized tax benefits, excluding interest, as of September 30, 2025, was $17.0 million, of which $2.3 million, if recognized, would affect the Company’s effective tax rate. The Company’s total amount of unrecognized tax benefits, excluding interest, as of December 31, 2024, was $16.6 million, of which $2.1 million, if recognized, would affect the Company’s effective tax rate. As of September 30, 2025, the Company has recorded unrecognized tax benefits of $2.9 million, including interest of $0.6 million, as long-term taxes payable in the condensed consolidated balance sheets. The remaining $14.7 million has been recorded within the Company’s DTAs, which is subject to a full valuation allowance.

The valuation allowance was approximately $67.9 million as of September 30, 2025, and December 31, 2024, which was related to U.S. net federal and state DTAs. The worldwide net DTAs balance were immaterial as of September 30, 2025, and December 31, 2024.

The Company conducts business globally and, as a result, files numerous consolidated and separate income tax returns in the U.S. federal and various state and foreign jurisdictions. For U.S. federal and California income tax purposes, the statute of limitations currently remains open for the tax years ended 2021 to present and 2020 to present, respectively. In addition, all of the net operating loss and research and development credit carryforwards that may be utilized in future years may be subject to federal and state examination. The Company is not currently under known income tax examinations in the U.S. or any other of its major foreign subsidiaries’ jurisdictions.

On July 4, 2025, the One Big Beautiful Bill Act (“OBBBA”) was enacted in the United States. The OBBBA makes permanent key elements of the Tax Cuts and Jobs Act, including 100% bonus depreciation, domestic research cost expensing, and the business interest expense limitation. ASC 740, Income Taxes, requires the effects of changes in tax rates and laws on deferred tax balances to be recognized in the period in which the legislation is enacted. The Company has completed its initial assessment of the OBBBA corporate tax provisions in the third quarter of 2025. OBBBA contained U.S. corporate tax provisions under which the Company elected to expense U.S. incurred research or experimental expenditures immediately. As a result of the Company’s elections, it anticipates a favorable cash tax benefit of approximately $0.9 million and a reduction to its effective tax rate by approximately 19% in 2025.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Section S50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details