Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options Outstanding, Beginning Balance	3,972,909
Number of Options, Granted	1,186,138
Number of Options, Forfeited	(14,000)
Number of Options Outstanding, Ending Balance	5,145,047	3,972,909
Options vested and exercisable at March 31, 2021	28,009
Weighted Average Exercise Price, Options outstanding as of January 1, 2021	$ 17.84
Weighted Average Exercise Price, Granted	42.30
Weighted Average Exercise Price, Forfeited	36.80
Weighted Average Exercise Price, Options outstanding as of March 31, 2021	23.43	$ 17.84
Weighted Average Exercise Price, Options vested and exercisable at March 31, 2021	$ 6.76
Weighted Average Contractual Life, Options outstanding	9 years 4 months 24 days	9 years 7 months 6 days
Weighted Average Contractual Life, Options vested and exercisable at March 31, 2021	8 years 9 months 18 days
Aggregate Intrinsic Value, Options outstanding at January 1, 2021	$ 24,616	$ 81,822
Aggregate Intrinsic Value, Options vested and exercisable at March 31, 2021	$ 466