Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Restricted Stock Units (RSUs) [Member] Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2020		16,297,381
Balance at Dec. 31, 2020		$ 16	$ 135,234	$ (116,074)	$ 19,176
Restricted stock units issued (in shares)	40,100
Sale of common stock (in shares)		453,832
Sale of common stock		$ 1	1,933	0	1,934
Exercise of common stock options (in shares)		1,580
Exercise of common stock options			5		5
Share-based compensation			416		416
Net loss				(2,969)	(2,969)
Balance (in shares) at Mar. 31, 2021		16,792,893
Balance at Mar. 31, 2021		$ 17	137,588	(119,043)	18,562
Balance (in shares) at Dec. 31, 2021		16,871,265
Balance at Dec. 31, 2021		$ 17	139,055	(128,697)	$ 10,375
Exercise of common stock options (in shares)					(0)
Share-based compensation			319		$ 319
Net loss				(3,325)	(3,325)
Balance (in shares) at Mar. 31, 2022		16,871,265
Balance at Mar. 31, 2022		$ 17	$ 139,374	$ (132,022)	$ 7,369