Stockholders' Equity - Summary of Stock Option Activity (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares
Number of shares
Number of shares, Outstanding, beginning balance | shares	3,458,447
Number of shares, Granted | shares	649,142
Number of shares, Exercised | shares	(127,778)
Number of shares, Forfeited | shares	(207,628)
Number of shares, Cancelled | shares	(38,267)
Number of shares, Outstanding, ending balance | shares	3,733,916
Number of shares, Vested and expected to vest | shares	3,727,747
Number of shares, Exercisable | shares	2,479,110
Weighted average exercise price
Weighted average exercise price, Outstanding, beginning balance | $ / shares	$ 10.19
Weighted average exercise price, Granted | $ / shares	54.50
Weighted average exercise price, Exercised | $ / shares	8.22
Weighted average exercise price, Forfeited | $ / shares	35.85
Weighted average exercise price, Cancelled | $ / shares	58.98
Weighted average exercise price, Outstanding, ending balance | $ / shares	16.03
Weighted average exercise price, Vested and expected to vest | $ / shares	16.36
Weighted average exercise price, Exercisable | $ / shares	$ 10.66
Weighted average contractual term
Weighted average contractual term, Outstanding	7 years 2 months 12 days
Weighted average contractual term, Vested and expected to vest	7 years 2 months 12 days
Weighted average contractual term, Exercisable	6 years
Aggregate intrinsic value
Aggregate intrinsic value, Outstanding | $	$ 243,556,917
Aggregate intrinsic value, Vested and expected to vest | $	243,062,340
Aggregate intrinsic value, Exercisable | $	$ 175,575,360