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Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) Compounds shares | Dec. 31, 2022 USD ($) shares | Mar. 31, 2023 USD ($) Compounds shares | Mar. 31, 2022 USD ($) shares
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Cash and cash equivalents | $ 5,295,000 | $ 20,196,000 | $ 5,295,000 | $ 20,196,000 | $ 15,301,000 | $ 28,675,000
Restricted cash | 143,000 | 143,000 | 143,000 | 143,000 | 143,000 | 143,000
Accumulated deficit | $ (336,624,000) |  | (336,624,000) |  | (324,998,000) | (307,739,000)
Cash flow from operations |  |  | $ 11,982,000 | 7,675,000 | $ 12,408,000 | $ 8,453,000
Issuance of common stock | shares | 9,838,755 |  | 9,838,755 |  | 8,716,906 | 8,710,627
Restricted cash |  |  |  |  | $ 100,000 | $ 100,000
Impairment of long-lived assets |  |  |  |  | 0 | 0
Acquired in-process research and development accrued expenses | $ 0 |  | $ 0 |  | 2,000,000 | 0
Dilutive effect | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
Common stock equivalents excluded from computing diluted net loss per share | shares |  |  | 800,000 | 1,500,000 | 1,600,000 | 1,200,000
Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] |  |  |  |  | us-gaap:UsefulLifeTermOfLeaseMember |
Maximum [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Maturity of highly liquid investment |  |  |  |  | 3 months |
Useful life of fixed assets, range |  |  |  |  | 7 years |
Minimum [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of fixed assets, range |  |  |  |  | 1 year |
At-The-Market Facility [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Issuance of common stock | shares | 934,621 |  | 934,621 |  | 0 |
Metacrine's FXR Program [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of clinically tested compounds | Compounds |  |  | 2 |  |  |
Number of discovery or preclinical compounds | Compounds |  |  | 2,000 |  |  |
Metacrine, Inc. [Member] | Metacrine's FXR Program [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of clinically tested compounds | Compounds |  |  |  |  | 2 |
Number of discovery or preclinical compounds | Compounds |  |  |  |  | 2,000 |
Asset Acquisition, Price of Acquisition, Expected |  |  |  |  | $ 4,000,000 |
Upfront payment paid |  |  |  |  | 2,000,000 |
Acquired in-process research and development accrued expenses |  |  |  |  | $ 2,000,000 |

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