UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE SERIES A-1 PREFERRED STOCK, CONVERTIBLE AND REDEEMABLE SERIES A-2 PREFERRED STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Thousands	Total	Redeemable Series A-1 Preferred Stock	Convertible And Redeemable Series A-2 Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Beginning balance at Dec. 31, 2019	$ (26,291)				$ 38,153	$ (64,404)	$ (40)
Beginning balance, shares at Dec. 31, 2019				8,370,107
Beginning balance at Dec. 31, 2019		$ 128,822
Beginning balance, shares at Dec. 31, 2019		12,000
Net loss	(41,248)					(41,248)
Accretion of the redeemable series A-1 preferred stock to redeemable value	(5,415)				(5,415)
Accretion of the redeemable series A-1 preferred stock to redeemable shares		$ 5,415
Stock-based compensation	1,150				1,150
Accumulated other comprehensive income	37						37
Ending balance at Mar. 31, 2020	(71,767)				33,888	(105,652)	(3)
Ending balance, shares at Mar. 31, 2020		12,000
Ending balance at Mar. 31, 2020		$ 134,237
Ending balance, shares at Mar. 31, 2020				8,370,107
Beginning balance at Dec. 31, 2020	137,145				259,427	(122,353)	71
Beginning balance, shares at Dec. 31, 2020				24,932,527
Beginning balance at Dec. 31, 2020			$ 152,928
Beginning balance, shares at Dec. 31, 2020			17,500
Net loss	(11,596)					(11,596)
Stock-based compensation	1,805				1,805
Dividend payment to the Series A-2preferred shareholders	(4,100)		$ (4,100)		(4,100)
Common stock issued	$ 4,456				4,456
Common stock issued, shares	506,330			506,330
Accumulated other comprehensive income	$ 29						29
Ending balance at Mar. 31, 2021	$ 127,739				$ 261,588	$ (133,949)	$ 100
Ending balance, shares at Mar. 31, 2021			17,500
Ending balance at Mar. 31, 2021			$ 152,928
Ending balance, shares at Mar. 31, 2021				25,438,857