Deconsolidation of European Subsidiary - Additional Information (Detail) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Apr. 16, 2026 |
Dec. 31, 2025 |
Aug. 29, 2025 |
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| Deconsolidation of European Subsidiary [Line Item] | ||||||
| Term loan | $ 75,000,000 | |||||
| Redeemable non-controlling interests | $ 21,480,000 | $ 21,480,000 | $ 21,480,000 | |||
| Gain on deconsolidation of subsidiary | 30,940,000 | $ 0 | ||||
| Subsidiaries [Member] | ||||||
| Deconsolidation of European Subsidiary [Line Item] | ||||||
| Gain on deconsolidation of subsidiary | 30,900,000 | 30,900,000 | ||||
| Fibrogen Europe Oy [Member] | ||||||
| Deconsolidation of European Subsidiary [Line Item] | ||||||
| Term loan | 19,200,000 | 19,200,000 | ||||
| Redeemable non-controlling interests | 12,500,000 | 12,500,000 | ||||
| Cumulative foreign currency translation adjustments | 700,000 | |||||
| Retained interest | $ 0 | |||||
| Carrying value of retained equity interest | $ 0 | $ 0 | ||||
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- Definition CarryingValueofRetainedEquityInterest No definition available.
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- Definition DeconsolidationofEuropeanSubsidiaryLine Item No definition available.
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- Definition The increase (decrease) in cumulative translation adjustment before transfers included in determining net income. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of gain (loss) from deconsolidation of subsidiary and derecognition of group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral rights and transfer of good or service in contract with customer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value portion of interest continued to be held by a transferor after transferring financial assets to a third party. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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- Details
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