CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Non-Controlling Interest
Beginning balance at Dec. 31, 2019	$ (136,622)	$ 78	$ 4,310	$ 6	$ (145,530)	$ 4,514
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	4,106				(2,178)	6,284
Foreign currency translation loss	(1)			(1)
Stock-based compensation	4		4
Distributions	(1,292)					(1,292)
Ending balance at Sep. 30, 2020	(133,805)	78	4,314	5	(147,708)	9,506
Beginning balance at Jun. 30, 2020	(136,009)	78	4,310	7	(147,508)	7,104
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	2,494				(200)	2,694
Foreign currency translation loss	(2)			(2)
Stock-based compensation	4		4
Distributions	(292)					(292)
Ending balance at Sep. 30, 2020	(133,805)	78	4,314	5	(147,708)	9,506
Beginning balance at Dec. 31, 2020	127,104	103	270,800	44	(143,843)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(38,894)				(38,894)
Issuance of common stock	64,269	2	64,267
Foreign currency translation loss	(40)			(40)
Stock-based compensation	47,197		47,197
Repurchase of outstanding warrants	(26,894)		(26,894)
Repurchase of common stock	(1,251)		(1,251)
Ending balance at Sep. 30, 2021	171,491	105	354,119	4	(182,737)	0
Beginning balance at Jun. 30, 2021	164,700	105	341,928	17	(177,350)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(5,387)				(5,387)
Foreign currency translation loss	(13)			(13)
Stock-based compensation	12,191		12,191
Ending balance at Sep. 30, 2021	$ 171,491	$ 105	$ 354,119	$ 4	$ (182,737)	$ 0