Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Number of Outstanding Options
Balance at December 31, 2021	3,425,285
Granted	1,263,317
Cancelled	(369,324)
Balance at March 31, 2022	4,319,278	3,425,285
Vested and expected to vest at March 31, 2022	4,319,278
Exercisable at March 31, 2022	1,340,204
Weighted Average Exercise Price
Balance at December 31, 2021	$ 6.17
Granted	0.47
Cancelled	3.85
Balance at March 31, 2022	4.70	$ 6.17
Vested and expected to vest at March 31, 2022	4.70
Exercisable at March 31, 2022	$ 5.97
Weighted Average Remaining Contractual Term (In Years)
Balance	7 years 7 months 6 days	7 years 9 months 25 days
Vested and expected to vest at March 31, 2022	7 years 7 months 6 days
Exercisable at March 31, 2022	5 years 9 months 10 days
Aggregate Intrinsic Value
Balance	$ 181	$ 6
Vested and expected to vest at March 31, 2022	181
Exercisable at March 31, 2022	$ 4