Leases - Additional Information (Details)						1 Months Ended		12 Months Ended
	Aug. 17, 2021	Aug. 03, 2021 USD ($) ft²	May 25, 2021	Mar. 18, 2021	Mar. 01, 2021	Jan. 31, 2017 USD ($) ft²	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 31, 2016	Feb. 29, 2016 USD ($)
Capital Leased Assets [Line Items]
Sublease income								$ 88,000
Lease term description					The lease term is from March 2021 through February 2023
Operating right-of-use assets								5,053,000	$ 0		$ 5,800,000
Letter of Credit
Capital Leased Assets [Line Items]
Decrease in security deposit		$ 2,300,000
Inner Belt Road Lease
Capital Leased Assets [Line Items]
Lease agreement term							10 years			10 years
Office and laboratory space for lease | ft²							25,785
Rental charges							$ 100,000
Sublease agreement term							10 years			10 years
Additional Space for primary office and laboratory | ft²						10,500
Rent for additional space						$ 33,000
Lease expense								1,300,000	1,300,000
Open Biome
Capital Leased Assets [Line Items]
Sublease income								100,000	400,000
Cherry Street Lease
Capital Leased Assets [Line Items]
Lease expense								100,000	0
Concord Avenue Lease
Capital Leased Assets [Line Items]
Lease expense								200,000	$ 0
Lease term description	On August 17, 2021 Finch extended the term of the lease for an additional two-month period through April 2022 and on February 4, 2022 Finch further extended the lease for an additional month through May 2022.		May 2021 through February 2022
100 Hood Park Drive
Capital Leased Assets [Line Items]
Lease agreement term		10 years
Office and laboratory space for lease | ft²		61,139
Rental charges		$ 4,500,000
Sublease agreement term		10 years
Lease expense								0
Lease term description				The Hood Lease provides Finch with an option to extend the lease for one additional five-year term
Operating right-of-use assets								0
Lease liability								0
Tenant improvement allowance		$ 14,800,000
Tenant Improvements								$ 5,300