Business Combination - Schedule of Summarizes the Allocation of the Purchase Price to the Net Tangible and Intangible Assets Acquired (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 15, 2020
Net assets acquired:
Goodwill	$ 20,089
resTORbio
Net assets acquired:
Cash and cash equivalents	63,869
Prepaid expenses and other current assets	3,059
Property and equipment	318
IPR&D	3,490
Restricted cash	245
Accounts payable	(1,316)
Accrued and other current liabilities	(2,365)
Deferred tax liability	(367)
Goodwill	20,089
Purchase price	87,022
resTORbio | Preliminary
Net assets acquired:
Cash and cash equivalents		$ 63,869
Prepaid expenses and other current assets		2,505
Property and equipment		318
IPR&D		3,490
Restricted cash		245
Accounts payable		(1,316)
Accrued and other current liabilities		(2,421)
Other liabilities		(40)
Deferred tax liability		(367)
Goodwill		20,739
Purchase price		$ 87,022
resTORbio | Measurement Period Adjustments
Net assets acquired:
Prepaid expenses and other current assets	554
Accrued and other current liabilities	56
Other liabilities	40
Goodwill	$ (650)