CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (DEFICIT) - UNAUDITED - USD ($) shares in Thousands, $ in Thousands	Total	2021 Notes	Preferred Stock	Common Stock	Common Stock 2021 Notes	Additional Paid-In Capital	Additional Paid-In Capital 2021 Notes	Accumulated Deficit
Balance (in shares) at Dec. 31, 2020			6,140	24,752
Balance at Dec. 31, 2020	$ 2,069		$ 1	$ 2		$ 59,812		$ (57,746)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,109)							(1,109)
Stock-based compensation	181					181
Exercise of stock options (in shares)				36
Exercise of stock options	40					40
Balance (in shares) at Mar. 31, 2021			6,140	24,788
Balance at Mar. 31, 2021	1,181		$ 1	$ 2		60,033		(58,855)
Balance (in shares) at Dec. 31, 2021			6,140	25,086
Balance at Dec. 31, 2021	(8,572)		$ 1	$ 3		61,194		(69,770)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(19,376)							(19,376)
Stock-based compensation	$ 1,924					1,924
Exercise of stock options (in shares)	114			114
Exercise of stock options	$ 127					127
Conversion of stock (in shares)			(6,140)	6,140	4,128
Conversion of stock	0	$ 33,024	$ (1)	$ 1			$ 33,024
Merger and recapitalization, net of fees (in shares)				2,007
Merger and recapitalization, net of fees	27,997					27,997
Stockholder contribution for debt issuance costs	924					924
Escrow shares derivative liability (in shares)				1,625
Escrow shares derivative liability	(6,867)					(6,867)
Private warrants derivative liability	(3,916)					(3,916)
Forward share purchase agreement derivative liability (in shares)				3,861
Forward share purchase agreement derivative liability	(14,170)					(14,170)
Shareholder earnout rights derivative liability	(26,131)					(26,131)
Balance (in shares) at Mar. 31, 2022			0	42,961
Balance at Mar. 31, 2022	$ (15,036)		$ 0	$ 4		$ 74,106		$ (89,146)