Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) $ in Millions	3 Months Ended
Sep. 30, 2020 USD ($)
Additional Paid-in Capital [Member]
Issuance costs	$ 0.1

Amount of decrease in additional paid in capital (APIC) resulting from direct costs (legal fees) associated with issuing stock under a private placement.

No definition available.

Name:	pdfs_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCostsPrivatePlacement
Namespace Prefix:	pdfs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration