CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
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			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
Beginning Balance at Dec. 31, 2021	32,639	$ 6	$ 366	293,030	(260,763)
Begining Balance (in shares) at Dec. 31, 2021		565	36,574,702
Issuance of common stock from stock option awards	$ (23)		$ 1	(24)
Issuance of common stock from stock options awards, shares	179,125		103,135
Stock-based compensation expense	$ 106			106
Net income	645				645
Ending Balance at Mar. 31, 2022	$ 33,367	$ 6	$ 367	$ 293,112	$ (260,118)
Ending Balance (in shares) at Mar. 31, 2022		565	36,677,837