Share Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Beginning Balance	18,871,592
Granted	5,520,081
Exercised	(50,353)
Forfeited	(4,603,373)
Ending Balance	19,737,947	18,871,592
Vested and expected to vest at March 31, 2022	19,737,947
Options exercisable at March 31, 2022	2,394,616
Beginning Balance	$ 10.15
Granted	6.56
Exercised	0.94
Forfeited	10.59
Ending Balance	9.07	$ 10.15
Vested and expected to vest at March 31, 2022	9.07
Options exercisable at March 31, 2022	$ 3.68
Weighted Average Remaining Contractual Term	9 years 2 months 12 days	9 years 3 months 18 days
Weighted Average Remaining Contractual Term, Vested and Expected to vest	9 years 2 months 12 days
Weighted Average Remaining Contractual Term, Exercisable	8 years 8 months 12 days
Aggregate Intrinsic Value, Outstanding	$ 24,897
Aggregate Intrinsic Value, Outstanding	10,594	$ 24,897
Aggregate Intrinsic Value, Vested and Expected to vest	10,594
Aggregate Intrinsic Value, Exercisable	$ 4,209