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Business Combination - Schedule of Summarizes the Purchase Price in the Merger (Parenthetical) (Details) - resTORbio	Sep. 15, 2020 shares
Business Acquisition [Line Items]
Unvested restricted stock units outstanding	91,309
Number of common stock shares sold	54,553
Number of shares of surviving stock options	81,370

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Number of new stock issued during the period.

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