Summary of Significant Accounting Policies - basic and diluted earnings per share calculations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income (loss) - basic	$ (6,982)	$ (13,448)	$ (118)	$ (25,489)	$ (20,430)	$ (25,606)
Effect of liability - classified warrants under the treasury stock method	(116)		(17,359)		(273)	(17,359)
Net income (loss) - diluted			(17,477)			(42,965)
Net income (loss) attributable to common stockholders - basic	$ (6,982)		(255,940)		$ (20,430)	(281,428)
Net income (loss) attributable to common stock-diluted			$ (273,299)			$ (298,788)
Denominator:
Weighted average shares - basic	65,732,343		41,727,480		64,348,966	38,709,614
Incremental effect of liability - classified warrants under the treasury stock method			766,906			430,647
Weighted average shares - diluted	65,732,343		42,494,386		64,348,966	39,140,261
Net loss per share:
Basic	$ (0.11)				$ (0.32)	$ (0.66)
Diluted	(0.11)		$ (0.41)		(0.32)	(1.10)
Net loss per share attributable to common stockholders:
Basic	(0.11)		(6.13)		(0.32)	(7.27)
Diluted	$ (0.11)		$ (6.43)		$ (0.32)	$ (7.63)