Stockholders' Equity and Stock Based Compensation - Restricted Stock Units (Details) - RSUs	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Number of Shares
Unvested, beginning balance (in shares) | shares	33,928,000
Granted (in shares) | shares	26,808,000
Vested (in shares) | shares	(9,928,000)
Forfeited (in shares) | shares	(2,978,000)
Unvested, ending balance (in shares) | shares	47,830,000
Weighted-Average Grant Date Fair Value
Unvested, beginning balance (in USD per share) | $ / shares	$ 5.41
Granted (in USD per share) | $ / shares	22.02
Vested (in USD per share) | $ / shares	5.17
Forfeited (in USD per share) | $ / shares	9.81
Unvested, ending balance (in USD per share) | $ / shares	$ 14.47