Business Combination - Schedule of Summarizes the Purchase Price in the Merger (Details) - USD ($) $ in Thousands	Sep. 15, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Contingent consideration liability		$ 980
resTORbio
Business Acquisition [Line Items]
Fair value of common stock shares of the combined company owned by resTORbio stockholders	$ 84,142
Contingent consideration liability	2,880
Purchase price	$ 87,022

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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