Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Diluted Net Loss Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive shares excluded from computation of earnings per share	81,992,991	183,505,007	171,292,096
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive shares excluded from computation of earnings per share	21,294,841	0	0
PRSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive shares excluded from computation of earnings per share	27,818,524	0	0
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive shares excluded from computation of earnings per share	32,879,626	36,557,759	24,344,848
Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive shares excluded from computation of earnings per share	0	139,444,346	139,444,346
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive shares excluded from computation of earnings per share	0	7,502,902	4,884,132
Warrants to purchase convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive shares excluded from computation of earnings per share	0	0	2,618,770