Consolidated Statements of Shareholders' Equity or Deficit (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2020	$ (14,100)	$ 286	$ 219,998	$ (234,384)
Balance, Shares at Dec. 31, 2020		28,601,358
Issuance of common stock, net of costs	9,340	$ 22	9,318
Issuance of common stock , net of costs , shares		2,202,420
Stock-based compensation expense	3,133		3,133
Vesting of restricted stock units, net	(336)	$ 2	(338)
Vesting of restricted stock units, net , Shares		209,541
Net loss	(6,761)			(6,761)
Balance at Mar. 31, 2021	(8,724)	$ 310	232,111	(241,145)
Balance, Shares at Mar. 31, 2021		31,013,319
Balance at Dec. 31, 2021	42,064	$ 467	287,351	(245,754)
Balance, Shares at Dec. 31, 2021		46,681,453
Issuance of common stock, net of costs	(16)	$ 93	(109)
Issuance of common stock , net of costs , shares		9,302,718
Stock-based compensation expense	1,479		1,479
Vesting of restricted stock units, net	$ (101)	$ 5	(106)
Vesting of restricted stock units, net , Shares		487,695
Exercise of stock options, net, Shares	220	220
Net loss	$ (4,264)			(4,264)
Balance at Mar. 31, 2022	$ 39,162	$ 565	$ 288,615	$ (250,018)
Balance, Shares at Mar. 31, 2022		56,472,086