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]
Shares, Outstanding at January 1, 2021	5,084,679
Shares, Granted	394,934
Shares, Exercised	(38,216)
Shares, Outstanding at March 31, 2021	5,441,397	5,084,679
Shares, Exercisable at March 31, 2021	989,860
Weighted-Average Exercise Price, Outstanding at January 1, 2021	$ 3.79
Weighted-Average Exercise Price, Granted	22.51
Weighted-Average Exercise Price, Exercised	1.31
Weighted-Average Exercise Price, Outstanding at Marche 31, 2021	5.16	$ 3.79
Weighted-Average Exercise Price, Exercisable at March 31, 2021	$ 1.80
Weighted-Average Remaining Contractual Term, Outstanding	9 years 2 months 26 days	9 years 5 months 1 day
Weighted-Average Remaining Contractual Term, Exercisable at March 31, 2021	8 years 10 months 6 days
Aggregate Intrinsic Value, Outstanding	$ 206,544	$ 32,086
Aggregate Intrinsic Value, Exercisable at March 31, 2021	$ 40,772