Earnings (Loss) Per Share - Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net loss	$ (51,340)	$ (31,211)	$ (164,093)	$ (72,227)
Deemed dividend attributable to BCF accretion	0	(6,247)	0	(6,247)
Net loss attributable to common shareholders	(51,340)	(37,458)	(164,093)	(78,474)
Net loss attributable to common shareholders	$ (51,340)	$ (37,458)	$ (164,093)	$ (78,474)
Denominator:
Weighted average common shares outstanding- Basic (in shares)	352,122,485	130,601,660	341,858,435	129,643,774
Weighted average common shares outstanding- Diluted (in shares)	352,122,485	130,601,660	341,858,435	129,643,774
Net loss per shares attributable to common shareholders- Basic (in dollars per share)	$ (0.15)	$ (0.29)	$ (0.48)	$ (0.61)
Net loss per shares attributable to common shareholders- Diluted (in dollars per share)	$ (0.15)	$ (0.29)	$ (0.48)	$ (0.61)