Stockholders' Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Number of shares underlying outstanding restricted stock units
Beginning Balance, restricted stock units (in shares) | shares	8,388,963
Granted, restricted stock units (in shares) | shares	2,201,865
Vested, restricted stock units (in shares) | shares	(2,552,277)
Forfeited, restricted stock units (in shares) | shares	(111,501)
Ending Balance, restricted stock units (in shares) | shares	7,927,050
Weighted- average grant date fair value
Beginning Balance, weighted average grant date fair value on restricted stock units (in dollars per share) | $ / shares	$ 23.00
Granted, weighted average grant date fair value on restricted stock units (in dollars per share) | $ / shares	67.56
Vested, weighted average grant date fair value on restricted stock units (in dollars per share) | $ / shares	19.77
Forfeited, weighted average grant date fair value on restricted stock units (in dollars per share) | $ / shares	24.83
Ending Balance, weighted average grant date fair value on restricted stock units (in dollars per share) | $ / shares	$ 36.39