Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Restricted Stock Units (RSUs) [Member] Preferred Stock [Member]	Restricted Stock Units (RSUs) [Member] Common Stock [Member]	Restricted Stock Units (RSUs) [Member] AOCI Attributable to Parent [Member]	Restricted Stock Units (RSUs) [Member] Retained Earnings, Appropriated [Member]	Restricted Stock Units (RSUs) [Member]	Preferred Stock [Member]	Common Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings, Appropriated [Member]	Total
Balance (in shares) at Dec. 31, 2020						0	13,235,038
Balance at Dec. 31, 2020						$ 0	$ 139,726	$ (992)	$ (130,006)	$ 8,728
Exercise of stock options (in shares)						0	63,112
Exercise of stock options						$ 0	$ 36	0	0	36
Stock-based compensation	$ 0	$ 168	$ 0	$ 0	$ 168
Net loss						0	0	0	(860)	(860)
Foreign currency translation, net of tax						$ 0		(9)	0	(9)
Foreign currency translation adjustment, net of tax							$ (23)			(32)
Balance (in shares) at Mar. 31, 2021						0	13,298,150
Balance at Mar. 31, 2021						$ 0	$ 139,907	(1,001)	(130,866)	8,040
Balance (in shares) at Dec. 31, 2021						0	20,374,406
Balance at Dec. 31, 2021						$ 0	$ 172,397	(1,024)	(132,248)	$ 39,125
Exercise of stock options (in shares)						0	54,167			54,167
Exercise of stock options						$ 0	$ 65	0	0	$ 65
Issuance of common stock upon settlement of restricted stock units (RSUs) (in shares)	0	17,307
Stock-based compensation						0	75	0	0	75
Cash settlement of performance stock units						0	(137)	0	0	(137)
Net loss						0	0	0	(888)	(888)
Foreign currency translation, net of tax						$ 0	$ 0	3	0	3
Balance (in shares) at Mar. 31, 2022						0	20,445,880
Balance at Mar. 31, 2022						$ 0	$ 172,400	$ (1,021)	$ (133,136)	$ 38,243