Income Taxes - Schedule of effective income tax rate reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (136,392,000)	$ (98,895,000)
United States statutory income tax rate	21.00%	21.00%
Income tax (benefit) at United States statutory income tax rate	$ (28,642,000)	$ (20,768,000)
Change in valuation allowance	(146,794,000)	24,609,000
Recapitalization transaction	157,855,000	0
Cancellation of debt income	15,360,000	0
State tax provision, net of federal benefit	1,263,000	(3,847,000)
Warrant fair value adjustment	790,000	0
Other	168,000	6,000
Income Tax Benefit	$ 0	$ 0