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Commitments and Contingencies - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2021 | Apr. 30, 2021 | Sep. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2023
Loss Contingencies [Line Items] |  |  |  |  |
Payments in equity, amount | $ 10.0 |  |  |  |
Lonza DMSA |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Percentage of defer payments agreed for completion |  | 50.00% |  |  |
Amount recorded with respect to the potential future payments above the initial cash cap |  | $ 10.0 |  |  |
Number of common stock issued | 399,680 |  |  |  |
Public offering price per share | $ 25.02 |  |  |  |
Sutro Biopharma Inc |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of common stock issued |  |  |  | 167,780 |
Upfront Consideration |  |  |  | $ 22.5 |
Upfront Consideration in Cash |  |  |  | 10.0 |
Upfront Consideration in Cash After Agreement Date |  |  |  | 5.0 |
Option Exercise Price in Cash |  |  |  | 75.0 |
Additional Milestone Payments in Cash |  |  |  | 60.0 |
Accrued Commitment |  |  | $ 5.0 | 5.0 |
Fair Value on Date of Settlement |  |  |  | 8.0 |
Sutro Biopharma Inc | Scenario Forecast |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Accrued payment |  |  |  |  | $ 5.0
Sutro Biopharma Inc | Common Stock |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Upfront Consideration |  |  |  | $ 7.5 |

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