XML 62 R52.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Collaboration Agreements,License Agreement and Revenues - Roll-forward of Related Contract Liabilities (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($)
Contract with Customer Liability [Line Items] |
Balance at December 31, 2020 | $ (2,147)
Balance at December 31, 2021 | (58,909)
AstraZeneca Agreements [Member] |
Contract with Customer Liability [Line Items] |
Balance at December 31, 2020 | (137,338)
Additions | (69,746)
Balance at December 31, 2021 | (171,516)
Milestone payment received | 35,568
Product [Member] | Direct Sales [Member] | Contract Liabilities [Member] |
Contract with Customer Liability [Line Items] |
Balance at December 31, 2020 | (15,137)
Additions | (1,371)
Deduction | 13,645
Currency Translation and Other | (313)
Balance at December 31, 2021 | (3,176)
Drug Product Revenue [Member] |
Contract with Customer Liability [Line Items] |
Balance at December 31, 2020 | (5,984)
Additions | (83,019)
Balance at December 31, 2021 | (39,036)
Milestone payment received | 179
Balance Presented Net Against Contract Asset | 49,788
Drug Product Revenue [Member] | AstraZeneca Agreements [Member] | U.S. [Member] |
Contract with Customer Liability [Line Items] |
Balance at December 31, 2020 | 0
Additions | (11,171)
Balance at December 31, 2021 | (11,171)
Milestone payment received | 0
Balance Presented Net Against Contract Asset | 0
Drug Product Revenue [Member] | Astellas Agreement | Japan [Member] |
Contract with Customer Liability [Line Items] |
Balance at December 31, 2020 | 0
Additions | (1,974)
Balance at December 31, 2021 | (1,974)
Milestone payment received | 0
Balance Presented Net Against Contract Asset | 0
Drug Product Revenue [Member] | Astellas Agreement | Europe [Member] |
Contract with Customer Liability [Line Items] |
Balance at December 31, 2020 | (5,984)
Additions | (69,874)
Balance at December 31, 2021 | (25,891)
Milestone payment received | 179
Balance Presented Net Against Contract Asset | $ 49,788

X
- Definition Contract with customer liability additions. + References No definition available. + Details
Name: | fgen_ContractWithCustomerLiabilityAdditions
Namespace Prefix: | fgen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract with customer liability deduction. + References No definition available. + Details
Name: | fgen_ContractWithCustomerLiabilityDeduction
Namespace Prefix: | fgen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract with customer, liability, increase (decrease) from current translation and other. + References No definition available. + Details
Name: | fgen_ContractWithCustomerLiabilityIncreaseDecreaseFromCurrentTranslationAndOther
Namespace Prefix: | fgen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract with customer liability. + References No definition available. + Details
Name: | fgen_ContractWithCustomerLiabilityLineItems
Namespace Prefix: | fgen_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contract with customer liability net of balance presented against contract asset. + References No definition available. + Details
Name: | fgen_ContractWithCustomerLiabilityNetOfBalancePresentedAgainstContractAsset
Namespace Prefix: | fgen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=fgen_AstraZenecaAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=fgen_DirectSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=fgen_ContractLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=fgen_DrugProductRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=fgen_AstellasAgreementMember
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_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |