CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2020	$ 174	$ (362)	$ (43)	$ 77,187	$ (61,295)	$ 15,661
Beginning Balance, shares at Dec. 31, 2020	17,428	10
Restricted stock awards	$ 1			(1)
Restricted Stock Awards, shares	149
Tax withholdings related to stock-based compensation awards						0
Public stock offering, net of fees	$ 13			5,543		5,556
Public stock offering, net of fees, shares	1,302
Stock-based compensation expense				1,260		1,260
Exercise of stock options	$ 3			241		244
Exercise of stock options, shares	256
Net loss					(18,802)	(18,802)
Ending balance, value at Dec. 31, 2021	$ 191	$ (362)	(43)	84,230	(80,097)	3,919
Ending Balance, shares at Dec. 31, 2021	19,135	10
Restricted stock awards	$ 1			(1)
Restricted Stock Awards, shares	103
Tax withholdings related to stock-based compensation awards				(9)		(9)
Registered direct offering proceeds, net of fees	$ 12			4,284		4,296
Registered direct offering proceeds, net of fees, shares	1,213
Issuance of common stock to terminate operating lease	$ 1			199		200
Issuance of common stock to terminate operating lease, shares	75
Nonregistered private placement				100		100
Nonregistered private placement, shares	32
Public stock offering, net of fees	$ 6			1,979		1,985
Public stock offering, net of fees, shares	541
Stock-based compensation expense				1,456		1,456
Exercise of stock options	$ 1			66		67
Exercise of stock options, shares	99
Net loss					(16,229)	(16,229)
Ending balance, value at Dec. 31, 2022	$ 212	$ (362)	$ (43)	$ 92,304	$ (96,326)	$ (4,215)
Ending Balance, shares at Dec. 31, 2022	21,198	10