Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Preferred Stock [Member] Convertible Preferred Stock [Member]	Common Stock [Member]		Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2021			$ 3		$ 527,639	$ (508,398)	$ 19,244
Balance, shares at Dec. 31, 2021			3,299,379	[1]
Stock-based compensation expense					762		762
Vesting of restricted stock units
Vesting of restricted stock units, shares	[1]		25,676
Net loss						(3,771)	(3,771)
Issuance of preferred stock and warrants through underwritten offering, net of issuance costs of $184					1,685		1,685
Issuance of preferred stock and warrants through underwritten offering, net of issuance costs of $184, shares		5,000
Issuance of common stock upon conversion of preferred stock			$ 1		(1)
Issuance of common stock upon conversion of preferred stock, shares		(5,000)	655,738	[1]
Shares withheld for tax withholding					(127)		(127)
Shares withheld for tax withholding, shares	[1]		(7,402)
Balance at Mar. 31, 2022			$ 4		529,958	(512,169)	17,793
Balance, shares at Mar. 31, 2022			3,973,391	[1]
Balance at Dec. 31, 2022			$ 7		532,842	(516,231)	16,618
Balance, shares at Dec. 31, 2022			7,258,186	[1]
Stock-based compensation expense					46		46
Vesting of restricted stock units
Vesting of restricted stock units, shares	[1]		66,820
Net loss						(4,243)	(4,243)
Balance at Mar. 31, 2023			$ 7		$ 532,888	$ (520,474)	$ 12,421
Balance, shares at Mar. 31, 2023			7,325,006	[1]

[1] Giving retroactive effect to the 1-for-25 reverse stock split effectuated on May 16, 2022