Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2020	20,373,519
Balance at Dec. 31, 2020	$ 2,037	$ 185,464	$ (1,782)	$ (47,598)	$ (21,321)	$ 123	$ 116,923
Net (loss) income				671		8	679
Stock option exercises (in shares)	37,159
Stock option exercises	$ 4	27			(52)		(21)
Stock-based compensation – stock options		163					163
Stock-based compensation – restricted stock		21					21
Vesting of restricted stock (in shares)	5,833
Vesting of restricted stock	$ 1	(1)			(7)		(7)
Foreign currency translation adjustments adjustments			103				103
Balance (in shares) at Mar. 31, 2021	20,416,511
Balance at Mar. 31, 2021	$ 2,042	185,674	(1,679)	(46,927)	(21,380)	131	$ 117,861
Balance (in shares) at Dec. 31, 2021	20,522,427						16,089,832
Balance at Dec. 31, 2021	$ 2,052	186,518	(1,653)	(47,832)	(21,469)	127	$ 117,743
Net (loss) income				(168)		7	$ (161)
Stock option exercises (in shares)	38,369						58,750
Stock option exercises	$ 4	109			(7)		$ 106
Stock-based compensation – stock options		181					181
Stock-based compensation – restricted stock		8					8
Foreign currency translation adjustments adjustments			(236)				$ (236)
Balance (in shares) at Mar. 31, 2022	20,560,796						16,127,082
Balance at Mar. 31, 2022	$ 2,056	$ 186,816	$ (1,889)	$ (48,000)	$ (21,476)	$ 134	$ 117,641