Revenue - Summary of Deferred Revenue Activity (Details) - NIH Grant - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Movement in Deferred Revenue [Roll Forward]
Balance at beginning of period	$ 355	$ 918
Cash Received from NIH	2,988	1,000
Recognized as revenue	(3,326)	(1,563)
Balance at end of period	$ 17	$ 355