Related Party Transactions - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Related Party Transaction [Line Items]
Share of common stock held from Regeneron	24,959,848		24,959,848		24,951,983
Unbilled accounts receivable due from Regeneron	$ 10,000,000.0		$ 10,000,000.0		$ 11,400,000
Amount due to Regeneron	0		0		0
Contra-research and development expense	2,200,000	$ 3,800,000	5,200,000	$ 5,700,000
Consulting services expenses	0	$ 100,000	0	$ 200,000
Due to related party	$ 0		$ 0		$ 100,000
Regeneron Agreement
Related Party Transaction [Line Items]
Share of common stock held from Regeneron	2,097,314		2,097,314