Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Noncash lease expense	$ 475	$ 441
Changes in operating assets and liabilities:
Deferred rent		0
Operating lease liability	(1,236)	(1,167)
Net cash used in operating activities	$ (35,738)	(22,225)
Previously Reported
Operating activities
Noncash lease expense		0
Changes in operating assets and liabilities:
Deferred rent		(726)
Operating lease liability		0
Net cash used in operating activities		(22,225)
Revision of Prior Period, Accounting Standards Update, Adjustment
Operating activities
Noncash lease expense		441
Changes in operating assets and liabilities:
Deferred rent		726
Operating lease liability		(1,167)
Net cash used in operating activities		$ 0