Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands		Common Stock [Member]		Preferred Stock [Member] Series B Convertible Preferred Stock [Member]		Preferred Stock [Member] Series C Convertible Preferred Stock [Member]		Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2020			[1]		[1]		[1]	$ 180,339	$ (168,176)	$ 12,163
Beginning balance, shares at Dec. 31, 2020		3,284,322		17,303		2,343
Net loss									(3,243)	(3,243)
Issuance of common shares, including at the market offering net of $2,018 issuance costs		$ 1						25,241		25,242
Issuance of common shares, including at the market offering net of issuance costs, shares		3,133,775
Exercise of Warrants F			[1]					8,120		8,120
Exercise of Warrants F, shares		1,093,536
Exercise of Warrants G			[1]					1,349		1,349
Exercise of Warrants G, shares		131,876
Conversion of Series B Convertible Preferred Stock to common shares	[1]
Conversion of Series B Convertible Preferred Stock to common stock, shares		207,528		(17,303)
Conversion of Series C Convertible Preferred Stock to common shares	[1]
Conversion of series C convertible preferred stock to common stock, shares		831				(625)
Share-based compensation related to restricted stock, restricted stock units and stock options award, net of forfeitures of 4,563 shares			[1]					323		323
Share-based compensation related to restricted stock, restricted stock units and stock options award, net of forfeitures, shares		923
Ending balance, value at Mar. 31, 2021		$ 1			[1]		[1]	215,372	(171,419)	43,954
Ending balance, shares at Mar. 31, 2021		7,852,791				1,718
Beginning balance, value at Dec. 31, 2021		$ 1					[1]	216,625	(183,094)	33,532
Beginning balance, shares at Dec. 31, 2021		8,296,256				1,718
Net loss									(4,481)	(4,481)
Share-based compensation related to restricted stock, restricted stock units and stock options award, net of forfeitures of 4,563 shares								653		653
Share-based compensation related to restricted stock, restricted stock units and stock options award, net of forfeitures, shares		21,620
Ending balance, value at Mar. 31, 2022		$ 1					[1]	$ 217,278	$ (187,575)	$ 29,704
Ending balance, shares at Mar. 31, 2022		8,317,876				1,718

[1] Represents an amount less than $1 thousand