Net Loss Per Share - Antidilutive Shares (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	23,586	7,967
Shares subject to outstanding common stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	3,681	1,827
Shares subject to convertible promissory notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	2,400	0
Shares subject to shareholder earn-out rights
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	5,429	0
Shares subject to Public Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	6,501	0
Shares subject to Private Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	3,950	0
Escrow Shares (see Note 12)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	1,625	0
Series A preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	0	6,140