Stock-Based Compensation - Restricted Stock Units (Details)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Shares
Granted (in shares)	6,204,000
Canceled/Forfeited (in shares)	(436,000)
Restricted stock units
Shares
Balance (in shares)	2,404
Granted (in shares)	3,102
Vested (in shares)	(1,100)
Canceled/Forfeited (in shares)	(218)
Balance (in shares)	4,188
Weighted Average Grant Date Fair Value
Balance (in dollars per share) | $ / shares	$ 19.86
Granted (in dollars per share) | $ / shares	39.94
Vested (in dollars per share) | $ / shares	19.69
Canceled/Forfeited (in dollars per share) | $ / shares	24.70
Balance (in dollars per share) | $ / shares	$ 34.02