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Note 5 - LEASES - Other (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 USD ($) | Jun. 30, 2022 USD ($) lease | Dec. 31, 2021 USD ($) lease
LEASES |  |  |
Number of finance leases | lease |  | 0 | 0
Operating Lease, Liability, Amount Related to Extension of Lease Term |  | $ 1,100 |
Operating Lease, Liability, Current |  | 1,493 | $ 1,758
Operating lease right of use assets decrease from early lease termination | $ 500 |  |
Operating lease liability decrease from early lease termination | $ 600 |  |
Lease termination gain |  | $ 100 |

X
- Definition Amount of lease termination expense. + References No definition available. + Details
Name: | pdfs_LeaseTerminationExpense
Namespace Prefix: | pdfs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of finance leases as of balance sheet date. + References No definition available. + Details
Name: | pdfs_NumberOfFinanceLeases
Namespace Prefix: | pdfs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents operating lease liability adjustment for early lease termination. + References No definition available. + Details
Name: | pdfs_OperatingLeaseLiabilityAdjustmentForEarlyLeaseTermination
Namespace Prefix: | pdfs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of the operating lease liability related to an option to extend the lease term that is reasonably certain to be exercised. + References No definition available. + Details
Name: | pdfs_OperatingLeaseLiabilityAmountRelatedToExtensionOfLeaseTerm
Namespace Prefix: | pdfs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents operating lease right of use asset adjustment for early lease termination. + References No definition available. + Details
Name: | pdfs_OperatingLeaseRightOfUseAssetAdjustmentForEarlyTermination
Namespace Prefix: | pdfs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant