Business Combination - Schedule of Estimated Share Consideration of Combined Company (Details) - resTORbio $ / shares in Units, $ in Thousands	Sep. 15, 2020 USD ($) $ / shares shares
Business Acquisition [Line Items]
Number of shares of the combined company owned by resTORbio stockholders \| shares	5,207,695
Multiplied by the fair value per share of resTORbio common stock \| $ / shares	$ 16.59
Acquisition date fair value of resTORbio common shares	$ 86,396
Estimated fair value of modified stock options and restricted stock units attributable to pre-combination services	626
Less: portion of the fair value to be distributed as CVR	(2,880)
Fair value of common stock shares of the combined company owned by resTORbio stockholders	$ 84,142

Fair value of modified stock options and restricted stock units attributable to pre-combination services.

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Number of shares of equity interests issued or issuable to acquire entity.

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-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

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Fair value of equity issued in a business combination.

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