The measure of the company's ability to cover interest expense with funds generated from operations.

No definition available.

Name:	pdfs_DebtCovenantsInterestCoverageRatio
Namespace Prefix:	pdfs_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

Name:	us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

+ Details

Name:	us-gaap_SecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=pdfs_LineOfCreditFacilityLenderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=pdfs_AlternateBaseRateFederalFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=pdfs_AlternateBaseRateSecuredOvernightFinancingRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT - Revolving Credit Facility (Details) $ in Thousands	Mar. 07, 2025 USD ($)	Mar. 31, 2025 USD ($)
Line of Credit Facility [Line Items]
Revolving credit facility		$ 45,000
Term loan		$ 25,000
Wells Fargo \| Credit Agreement
Line of Credit Facility [Line Items]
Revolving credit facility	$ 45,000
Term loan	$ 25,000
Annual commitment fee	0.50%
Wells Fargo \| Credit Agreement \| Minimum
Line of Credit Facility [Line Items]
Debt covenants, fixed-charge coverage ratio	1.25
Wells Fargo \| Credit Agreement \| Maximum
Line of Credit Facility [Line Items]
Debt covenants, total net leverage ratio	3
Wells Fargo \| Credit Agreement \| Revolving Credit Facility \| Federal Funds Effective Rate
Line of Credit Facility [Line Items]
Marginal interest rate	0.50%
Wells Fargo \| Credit Agreement \| Revolving Credit Facility \| Minimum \| SOFR
Line of Credit Facility [Line Items]
Marginal interest rate	1.00%
Wells Fargo \| Credit Agreement \| Revolving Credit Facility \| Minimum \| Alternate Base Rate (Federal Funds Effective Rate)
Line of Credit Facility [Line Items]
Marginal interest rate	1.00%
Wells Fargo \| Credit Agreement \| Revolving Credit Facility \| Minimum \| Alternate Base Rate (SOFR)
Line of Credit Facility [Line Items]
Marginal interest rate	2.00%
Wells Fargo \| Credit Agreement \| Revolving Credit Facility \| Maximum \| Alternate Base Rate (Federal Funds Effective Rate)
Line of Credit Facility [Line Items]
Marginal interest rate	1.75%
Wells Fargo \| Credit Agreement \| Revolving Credit Facility \| Maximum \| Alternate Base Rate (SOFR)
Line of Credit Facility [Line Items]
Marginal interest rate	2.75%
Wells Fargo \| Credit Agreement \| Term Loan \| Minimum \| Alternate Base Rate (Federal Funds Effective Rate)
Line of Credit Facility [Line Items]
Marginal interest rate	1.00%
Wells Fargo \| Credit Agreement \| Term Loan \| Minimum \| Alternate Base Rate (SOFR)
Line of Credit Facility [Line Items]
Marginal interest rate	2.00%
Wells Fargo \| Credit Agreement \| Term Loan \| Maximum \| Alternate Base Rate (Federal Funds Effective Rate)
Line of Credit Facility [Line Items]
Marginal interest rate	1.75%
Wells Fargo \| Credit Agreement \| Term Loan \| Maximum \| Alternate Base Rate (SOFR)
Line of Credit Facility [Line Items]
Marginal interest rate	2.75%