Development Derivative Liability - Roll Forward (Details) - Derivative Liability - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Funding during the period	$ 41,900
Change in fair value	21,200
SFJ Agreement | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	51,719	$ 0
Initial payment, net of common stock warrants	2,075
Funding during the period	41,942	37,137
Change in fair value	21,182	12,507
Ending balance	$ 114,843	$ 51,719