Unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total	Preferred Stock [Member]
Beginning balance, value at Dec. 31, 2019	$ 136	$ (362)	$ (43)	$ 56,759	$ (54,777)	$ 3,556
Beginning balance, shares at Dec. 31, 2019	13,552,236	10,000					949,377
Conversion of preferred stock to common	$ 1			95
Conversion of preferred stock to common, shares	63,194,000						(63,194,000)
Preferred stock dividends declared, net of waived penalties by shareholders				(33)		(33)
Share-based compensation expense				19		19
Exercise of stock options	$ 1			74		75
Exercise of stock options, shares	172,600
Net loss					(465)	(465)
Ending balance, value at Mar. 31, 2020	$ 138	$ (362)	(43)	56,914	(55,242)	3,152
Ending balance, shares at Mar. 31, 2020	13,788,030	10,000					886,183
Beginning balance, value at Dec. 31, 2019	$ 136	$ (362)	(43)	56,759	(54,777)	3,556
Beginning balance, shares at Dec. 31, 2019	13,552,236	10,000					949,377
Ending balance, value at Jun. 30, 2020	$ 138	$ (362)	(43)	56,946	(55,957)	2,469
Ending balance, shares at Jun. 30, 2020	13,802,030	10,000					886,183
Beginning balance, value at Mar. 31, 2020	$ 138	$ (362)	(43)	56,914	(55,242)	3,152
Beginning balance, shares at Mar. 31, 2020	13,788,030	10,000					886,183
Dividends accrued				(33)		(33)
Share-based compensation expense				55		55
Exercise of stock options				10		10
Exercise of stock options, shares	14,000
Net loss					(715)	(715)
Ending balance, value at Jun. 30, 2020	$ 138	$ (362)	(43)	56,946	(55,957)	2,469
Ending balance, shares at Jun. 30, 2020	13,802,030	10,000					886,183
Beginning balance, value at Dec. 31, 2020	$ 174	$ (362)	(43)	77,187	(61,295)	15,661
Beginning balance, shares at Dec. 31, 2020	17,427,779	10,000
Share-based compensation expense				204		204
Exercise of stock options	$ 2			159		161
Exercise of stock options, shares	197,227
Net loss					(3,903)	(3,903)
Ending balance, value at Mar. 31, 2021	$ 176	$ (362)	(43)	77,550	(65,198)	12,123
Ending balance, shares at Mar. 31, 2021	17,625,006	10,000
Beginning balance, value at Dec. 31, 2020	$ 174	$ (362)	(43)	77,187	(61,295)	15,661
Beginning balance, shares at Dec. 31, 2020	17,427,779	10,000
Ending balance, value at Jun. 30, 2021	$ 176	$ (362)	(43)	78,363	(70,149)	7,985
Ending balance, shares at Jun. 30, 2021	17,631,006	10,000
Beginning balance, value at Mar. 31, 2021	$ 176	$ (362)	(43)	77,550	(65,198)	12,123
Beginning balance, shares at Mar. 31, 2021	17,625,006	10,000
Share-based compensation expense				806		806
Exercise of stock options				7		7
Exercise of stock options, shares	6,000
Net loss					(4,951)	(4,951)
Ending balance, value at Jun. 30, 2021	$ 176	$ (362)	$ (43)	$ 78,363	$ (70,149)	$ 7,985
Ending balance, shares at Jun. 30, 2021	17,631,006	10,000