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Equity method investment - Variable Interest Entity - Additional Information (Detail) - Beijing Falikang Pharmaceutical Co Ltd $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($)
Acquisition And Variable Interest Entity [Line Items] |
Dividend received | $ 2.3
Beijing Kangda Yongfu Pharmaceutical Co., LTD [Member] | FibroGen Beijing [Member] | AstraZenecaAB [Member] |
Acquisition And Variable Interest Entity [Line Items] |
Percentage of outstanding shares acquired | 51.10%

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