XML 62 R52.htm IDEA: XBRL DOCUMENT v3.24.0.1

Collaboration Agreements, License Agreement and Revenues - Transaction Price Related to Consideration Received and Accounts Receivable Allocated to Performance Obligations along with Associated Deferred Revenue (Detail) - Astellas Agreement [Member] $ in Thousands	Dec. 31, 2023 USD ($)
Japan [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Total Consideration	$ 117,439
Japan [Member] | License Revenue [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Total Consideration	100,347
Japan [Member] | Development Revenue [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Total Consideration	17,092
Europe [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Total Consideration	905,692
Europe [Member] | License Revenue [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Total Consideration	618,975
Europe [Member] | Development Revenue [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Total Consideration	$ 286,717

X

- Definition

The total cash consideration received under a collaboration agreement that has been allocated to the different significant units of accounting and includes the portion that has been deferred for revenue recognition.

+ References

No definition available.

+ Details

Name:	fgen_CashConsiderationReceivedUnderCollaborationAgreement
Namespace Prefix:	fgen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=fgen_AstellasCollaborationAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=country_JP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_LicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=fgen_DevelopmentAndOtherRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: