Consolidated Statements of Changes in Shareholders' Equity - 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, 2019	20,268,050
Balance at Dec. 31, 2019	$ 2,026	$ 184,292	$ (2,531)	$ (52,830)	$ (21,231)	$ 24	$ 109,750
Net (loss) income				5,232		99	$ 5,331
Stock option exercises (in shares)	92,968						355,797
Stock option exercises	$ 9	229			(75)		$ 163
Stock-based compensation -stock options		838					838
Stock-based compensation -restricted stock		105					105
Vesting of restricted stock (in shares)	12,501
Vesting of restricted stock	$ 2				(15)		(13)
Foreign currency translation adjustments			749				749
Vesting of restricted stock	$ (2)				15		$ 13
Balance (in shares) at Dec. 31, 2020	20,373,519						15,959,984
Balance at Dec. 31, 2020	$ 2,037	185,464	(1,782)	(47,598)	(21,321)	123	$ 116,923
Net (loss) income				(234)		4	$ (230)
Stock option exercises (in shares)	133,907						204,429
Stock option exercises	$ 13	385			(133)		$ 265
Stock-based compensation -stock options		618					618
Stock-based compensation -restricted stock		53					53
Vesting of restricted stock (in shares)	15,001
Vesting of restricted stock	$ (2)	2			15		15
Foreign currency translation adjustments			129				129
Vesting of restricted stock	$ 2	(2)			(15)		$ (15)
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