XML 50 R39.htm IDEA: XBRL DOCUMENT v3.26.1

Summary of Significant Accounting Policies - Research and Development - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Accounting Policies [Abstract]
Research and development commitments not yet incurred	$ 5,037	$ 6,220
Research and development commitments, cancellation terms, required written notice, period prior to desired termination date	60 days

X

- Definition

Research And Development Commitments, Cancellation Terms, Required Written Notice, Period Prior To Desired Termination Date

+ References

No definition available.

+ Details

Name:	pgen_ResearchAndDevelopmentCommitmentsCancellationTermsRequiredWrittenNoticePeriodPriorToDesiredTerminationDate
Namespace Prefix:	pgen_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Portion of commitments related to research and development arrangements with third parties which has not yet been incurred.

+ References

No definition available.

+ Details

Name:	pgen_ResearchAndDevelopmentCommitmentsNotYetIncurred
Namespace Prefix:	pgen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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