Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ 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					876,000
Beginning balance at Dec. 31, 2021		$ 6,209			$ 0	$ 0		$ 144,953	$ (3)	$ (138,741)
Beginning balance (in shares) at Dec. 31, 2021	[1]					910,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon the exercise of warrants (in shares)	[1]					12,000
Stock-based compensation		44						44
Net Income (Loss)		(2,821)								(2,821)
Ending balance (in shares) at Mar. 31, 2022					876,000
Ending balance at Mar. 31, 2022		3,432			$ 0	$ 0		144,997	(3)	(141,562)
Ending balance (in shares) at Mar. 31, 2022	[1]					922,000
Beginning balance (in shares) at Dec. 31, 2021					876,000
Beginning balance at Dec. 31, 2021		6,209			$ 0	$ 0		144,953	(3)	(138,741)
Beginning balance (in shares) at Dec. 31, 2021	[1]					910,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)		(5,307)
Ending balance (in shares) at Jun. 30, 2022					876,000
Ending balance at Jun. 30, 2022		4,171			$ 0	$ 1		148,221	(3)	(144,048)
Ending balance (in shares) at Jun. 30, 2022	[1]					1,116,000
Beginning balance (in shares) at Dec. 31, 2021					876,000
Beginning balance at Dec. 31, 2021		6,209			$ 0	$ 0		144,953	(3)	(138,741)
Beginning balance (in shares) at Dec. 31, 2021	[1]					910,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)		(10,300)
Ending balance (in shares) at Dec. 31, 2022					876,000
Ending balance at Dec. 31, 2022		$ (477)		$ (2)	$ 0	$ 1		148,545	(3)	(149,020)	$ (2)
Ending balance (in shares) at Dec. 31, 2022		1,406,920	[2]			1,407,000	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]		Accounting Standards Update 2016-13 [Member]
Beginning balance (in shares) at Mar. 31, 2022					876,000
Beginning balance at Mar. 31, 2022		$ 3,432			$ 0	$ 0		144,997	(3)	(141,562)
Beginning balance (in shares) at Mar. 31, 2022	[1]					922,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock option and stock purchase plans (in shares)	[1]					6,000
Issuance of common stock under employee stock option and stock purchase plans		5						5
Issuance of common stock and warrants (in shares)	[1]					188,000
Issuance of common stock and warrants		3,500				$ 1		3,499
Offering costs on issuance of common stock and warrants		(334)						(334)
Stock-based compensation		54						54
Net Income (Loss)		(2,486)								(2,486)
Ending balance (in shares) at Jun. 30, 2022					876,000
Ending balance at Jun. 30, 2022		4,171			$ 0	$ 1		148,221	(3)	(144,048)
Ending balance (in shares) at Jun. 30, 2022	[1]					1,116,000
Beginning balance (in shares) at Dec. 31, 2022					876,000
Beginning balance at Dec. 31, 2022		$ (477)		(2)	$ 0	$ 1		148,545	(3)	(149,020)	(2)
Beginning balance (in shares) at Dec. 31, 2022		1,406,920	[2]			1,407,000	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock option and stock purchase plans (in shares)						285,000
Issuance of common stock under employee stock option and stock purchase plans		$ 3,025				$ 1		3,024
Stock issued in exchange transactions (in shares)	[1]					1,057,000
Stock issued in exchange transactions		1,716						1,716
Stock-based compensation		26						26
Net Income (Loss)		(1,333)								(1,333)
Ending balance (in shares) at Mar. 31, 2023					876,000
Ending balance at Mar. 31, 2023		2,955			$ 0	$ 2		153,311	(3)	(150,355)
Ending balance (in shares) at Mar. 31, 2023	[1]					2,749,000
Beginning balance (in shares) at Dec. 31, 2022					876,000
Beginning balance at Dec. 31, 2022		$ (477)		$ (2)	$ 0	$ 1		148,545	(3)	(149,020)	$ (2)
Beginning balance (in shares) at Dec. 31, 2022		1,406,920	[2]			1,407,000	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)		$ (2,500)
Ending balance (in shares) at Jun. 30, 2023					876,000
Ending balance at Jun. 30, 2023		$ 3,099			$ 0	$ 0		154,624	(3)	(151,522)
Ending balance (in shares) at Jun. 30, 2023		3,495,924				3,496,000	[1]
Beginning balance (in shares) at Mar. 31, 2023					876,000
Beginning balance at Mar. 31, 2023		$ 2,955			$ 0	$ 2		153,311	(3)	(150,355)
Beginning balance (in shares) at Mar. 31, 2023	[1]					2,749,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock option and stock purchase plans (in shares)	[1]					747,000
Issuance of common stock under employee stock option and stock purchase plans		1,304						1,304
Par value adjustment due to reverse stock split		0				$ (2)		2
Reduction in equity due to costs from reverse stock split		(16)						(16)
Stock-based compensation		23						23
Net Income (Loss)		(1,167)								(1,167)
Ending balance (in shares) at Jun. 30, 2023					876,000
Ending balance at Jun. 30, 2023		$ 3,099			$ 0	$ 0		$ 154,624	$ (3)	$ (151,522)
Ending balance (in shares) at Jun. 30, 2023		3,495,924				3,496,000	[1]

[1] *Shares outstanding for prior periods have been restated for the 1-for-7 reverse stock split effective June 16, 2023.

[2] * Shares outstanding for prior periods have been restated for the 1-for-7 reverse stock split effective June 16, 2023.