CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2019	$ 11,847	$ 6	$ 293	$ 285,099	$ (273,474)	$ (77)
Begining Balance (in shares) at Dec. 31, 2019		568	29,339,101
Issuance of common stock from stock option awards	(2)		$ 1	(3)
Issuance of common stock from stock options awards, shares			19,805
Stock-based compensation expense	75			75
Net income	38				38
Ending Balance at Mar. 31, 2020	11,958	$ 6	$ 294	285,171	(273,436)	$ (77)
Ending Balance (in shares) at Mar. 31, 2020		568	29,358,906
Beginning Balance at Dec. 31, 2020	29,943	$ 6	$ 353	293,400	(263,816)
Begining Balance (in shares) at Dec. 31, 2020		568	35,281,183
Issuance of common stock from stock option awards	$ (120)		$ 4	(124)
Issuance of common stock from stock options awards, shares	492,875		366,294
Stock-based compensation expense	$ 67			67
Net income	1,032				1,032
Ending Balance at Mar. 31, 2021	$ 30,922	$ 6	$ 357	$ 293,343	$ (262,784)
Ending Balance (in shares) at Mar. 31, 2021		568	35,647,477