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Business Combination - Additional Information (Details) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 27, 2021 | Sep. 15, 2020 shares | Sep. 15, 2020 shares | Jun. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) ValueRight | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  | $ 700 | $ 1,200 |
Percentage of outstanding capital stock |  | 75.00% | 75.00% |  |  |
Reverse stock split |  | 1-for-7 | 1-for-7 |  |  |
Goodwill |  |  |  | 19,462 | $ 19,462 | $ 20,089
Expiration period termination notice | 60 days |  |  |  |  |
resTORbio |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Contractual Contingent Value Right | ValueRight |  |  |  |  | 1 |
Reverse stock split exchange ratio |  | 0.1240 |  |  |  |
Number of shares of surviving stock options | shares |  | 81,370 |  |  |  |
Unvested restricted stock units outstanding | shares |  | 91,309 | 91,309 |  |  |
Number of common stock shares sold | shares |  | 54,553 |  |  |  |
Measurement prior adjustment in tangible and intangible assets |  |  |  |  | $ 600 |
Goodwill |  |  |  | $ 19,462 | $ 19,462 |
resTORbio | Common Stock |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of outstanding capital stock |  | 25.00% | 25.00% |  |  |

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