Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 31, 2021			876	6,368
Beginning balance at Dec. 31, 2021	$ 6,209		$ 0	$ 0	$ 144,953	$ (3)	$ (138,741)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon the exercise of warrants (in shares)				85
Stock-based compensation	44				44
Net loss	(2,821)						(2,821)
Ending balance (in shares) at Mar. 31, 2022			876	6,453
Ending balance at Mar. 31, 2022	3,432		$ 0	$ 0	144,997	(3)	(141,562)
Beginning balance (in shares) at Dec. 31, 2021			876	6,368
Beginning balance at Dec. 31, 2021	6,209		$ 0	$ 0	144,953	(3)	(138,741)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(10,300)
Ending balance (in shares) at Dec. 31, 2022			876	9,849
Ending balance at Dec. 31, 2022	$ (477)	$ (2)	$ 0	$ 1	148,545	(3)	(149,020)	$ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Issuance of common stock (in shares)				1,995
Issuance of common stock	$ 3,025			$ 1	3,024
Stock issued in exchange transactions (in shares)				7,400
Stock issued in exchange transactions	1,716				1,716
Stock-based compensation	26				26
Net loss	(1,333)						(1,333)
Ending balance (in shares) at Mar. 31, 2023			876	19,244
Ending balance at Mar. 31, 2023	$ 2,955		$ 0	$ 2	$ 153,311	$ (3)	$ (150,355)