Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2020	$ 18	$ 141,612	$ (119,419)	$ 22,211
Begining balance, shares at Dec. 31, 2020	18,410,458
Equity compensation		1,632		1,632
Issuance of shares for vested restricted stock grants
Issuance of shares for vested restricted stock grants, shares	8,915
Net loss			(5,461)	(5,461)
Exercise of stock options, net of cashless exercise of 58,122 shares and 92,634 shares withheld	$ 1	1,755		1,756
Exercise of stock options, net of cashless exercise of shares, shares	206,545
Exercise of warrants		20		20
Exercise of warrants, shares	9,000
Ending balance, value at Jun. 30, 2021	$ 19	145,019	(124,880)	20,158
Ending balance, shares at Jun. 30, 2021	18,634,918
Beginning balance, value at Mar. 31, 2021	$ 18	144,302	(124,044)	20,276
Begining balance, shares at Mar. 31, 2021	18,593,757
Equity compensation		651		651
Issuance of shares for vested restricted stock grants
Issuance of shares for vested restricted stock grants, shares	7,161
Net loss			(836)	(836)
Exercise of stock options, net of cashless exercise of 58,122 shares and 92,634 shares withheld	$ 1	46		47
Exercise of stock options, net of cashless exercise of shares, shares	25,000
Exercise of warrants		20		20
Exercise of warrants, shares	9,000
Ending balance, value at Jun. 30, 2021	$ 19	145,019	(124,880)	20,158
Ending balance, shares at Jun. 30, 2021	18,634,918
Beginning balance, value at Dec. 31, 2021	$ 19	146,455	(126,897)	19,577
Begining balance, shares at Dec. 31, 2021	18,660,369
Equity compensation		1,349		1,349
Issuance of shares for vested restricted stock grants
Issuance of shares for vested restricted stock grants, shares	215,211
Net loss			(2,566)	(2,566)
Ending balance, value at Jun. 30, 2022	$ 19	147,804	(129,463)	18,360
Ending balance, shares at Jun. 30, 2022	18,875,580
Beginning balance, value at Mar. 31, 2022	$ 19	147,284	(128,365)	18,938
Begining balance, shares at Mar. 31, 2022	18,674,980
Equity compensation		520		520
Issuance of shares for vested restricted stock grants
Issuance of shares for vested restricted stock grants, shares	200,600
Net loss			(1,098)	(1,098)
Ending balance, value at Jun. 30, 2022	$ 19	$ 147,804	$ (129,463)	$ 18,360
Ending balance, shares at Jun. 30, 2022	18,875,580