CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands		Total		Block A Sponsor Earnout Shares	[3]	Block B Sponsor Earnout Shares	[4]	Common Stock		Common Stock Block A Sponsor Earnout Shares	Additional Paid in capital	Additional Paid in capital Block A Sponsor Earnout Shares	[3]	Additional Paid in capital Block B Sponsor Earnout Shares	[4]	Contingently Issuable Common Stock	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2018	[1]							3,930,336
Beginning balance at Dec. 31, 2018		$ (104,374)						$ 0	[1]		$ 20,211					$ 0	$ (124,585)
Shares issued to Restricted Units holders (in shares)		0
Stock-based compensation		$ 135									135
Net loss		(79,483)															(79,483)
Ending balance (in shares) at Dec. 31, 2019	[1]							3,930,336
Ending balance at Dec. 31, 2019		(183,722)	[2]					$ 0	[1]		20,346					0	(204,068)
Conversion of contingently redeemable preferred units (in shares)	[1]							14,727,844
Conversion of contingently redeemable preferred units		121,125						$ 2	[1]		121,123
Conversion of convertible notes payable (in shares)	[1]							10,886,336
Conversion of convertible notes payable		108,863						$ 1	[1]		108,862
Net equity infusion from the Merger (in shares)	[1]							18,364,805
Net equity infusion from the Merger		126,026						$ 2	[1]		126,024
Contingently Issuable Common Stock																17,944	(17,944)
Transaction cost incurred in the Merger		(10,274)									(10,274)
Capital contribution - disgorgement of short swing profits		$ 432									432
Shares issued to Restricted Units holders (in shares)		174,761,000						174,761	[1]
Stock-based compensation		$ 5,081									5,081
Release of Block A Sponsor earnout shares from restriction (in shares)	[1],[3]									859,000
Release/Reclassification of Sponsor Earnout shares				$ 12,559		$ 11,760						$ 12,559		$ 11,760
Net loss		(68,754)															(68,754)
Ending balance (in shares) at Dec. 31, 2020	[1]							48,943,082
Ending balance at Dec. 31, 2020		$ 123,096	[2]					$ 5	[1]		$ 395,913					$ 17,944	$ (290,766)

[1] See Note 1 for discussion of reverse capitalization given effect herein

[2] See Note 1 for discussion of reverse capitalization given effect herein

[3] See Note 2 for discussion of Sponsor Earnout Shares

[4] See Note 2 for discussion of Sponsor Earnout Shares