Net loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Class of Stock [Line Items]
Net loss	$ (48,149)	$ (65,171)
Weighted-average common shares, diluted (in shares)	18,294,483	7,733,885
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	55,774,752	96,981,278
Class A Common Stock
Class of Stock [Line Items]
Net loss	$ (43,027)	$ (33,085)
Weighted-average common shares, basic (in shares)	153,696,945	7,974,872
Weighted-average common shares, diluted (in shares)	153,696,945	7,974,872
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.28)	$ (4.15)
Diluted (in dollars per share)	$ (0.28)	$ (4.15)
Class B Common Stock
Class of Stock [Line Items]
Net loss	$ (5,122)	$ (32,086)
Weighted-average common shares, basic (in shares)	18,294,483	7,733,885
Weighted-average common shares, diluted (in shares)	18,294,483	7,733,885
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.28)	$ (4.15)
Diluted (in dollars per share)	$ (0.28)	$ (4.15)
Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)		0
Option | Stock Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	10,951,266	12,103,528
Convertible preferred stock | Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	66,821,981
Warrants | Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	24,328,608	12,103,528
Warrants | Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	230,820
Options and RSAs exercised under notes receivables
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	669,522	5,721,421
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	19,825,356	0