Summary of Significant Accounting Policies - Schedule of Basic and Diluted Net Income (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 income (loss)	$ 49,938	$ (46,325)	$ (96,078)	$ (212,143)
Denominator:
Weighted average shares outstanding - basic	106,369,910	18,416,078	48,071,685	18,412,761
Weighted average dilutive stock options	14,107,842
Weighted average dilutive warrants	3,105,070
Weighted average shares outstanding, diluted	123,582,822	18,416,078	48,071,685	18,412,761
Net income (loss), basic	$ 0.47	$ (2.52)	$ (2.00)	$ (11.52)
Net income (loss), diluted	$ 0.40	$ (2.52)	$ (2.00)	$ (11.52)