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 income				1,482		19	1,501
Stock option exercises (in shares)	88,656
Stock option exercises	$ 9	305			(52)		262
Stock-based compensation – stock options		337					337
Stock-based compensation – restricted stock		33					33
Vesting of restricted stock (in shares)	12,501
Vesting of restricted stock	$ 1	(1)			(15)		(15)
Foreign currency translation adjustments			196				196
Balance (in shares) at Jun. 30, 2021	20,474,676
Balance at Jun. 30, 2021	$ 2,047	186,138	(1,586)	(46,116)	(21,388)	142	119,237
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
Net income				811		11	822
Stock option exercises (in shares)	51,497
Stock option exercises	$ 5	278					283
Stock-based compensation – stock options		174					174
Stock-based compensation – restricted stock		12					12
Vesting of restricted stock (in shares)	6,668
Vesting of restricted stock					(8)		(8)
Foreign currency translation adjustments			93				93
Balance (in shares) at Jun. 30, 2021	20,474,676
Balance at Jun. 30, 2021	$ 2,047	186,138	(1,586)	(46,116)	(21,388)	142	$ 119,237
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 income				344		3	$ 347
Stock option exercises (in shares)	38,369						58,750
Stock option exercises	$ 4	109			(7)		$ 106
Stock-based compensation – stock options		362					362
Stock-based compensation – restricted stock		11					11
Vesting of restricted stock (in shares)	6,664
Vesting of restricted stock	$ 1	(1)			(4)		(4)
Foreign currency translation adjustments			(1,498)				$ (1,498)
Balance (in shares) at Jun. 30, 2022	20,567,460						16,132,868
Balance at Jun. 30, 2022	$ 2,057	186,999	(3,151)	(47,488)	(21,480)	130	$ 117,067
Balance (in shares) at Mar. 31, 2022	20,560,796
Balance at Mar. 31, 2022	$ 2,056	186,816	(1,889)	(48,000)	(21,476)	134	117,641
Net income				512		(4)	508
Stock option exercises (in shares)	0
Stock option exercises	$ 0	0			0		0
Stock-based compensation – stock options		181					181
Stock-based compensation – restricted stock		3					3
Vesting of restricted stock (in shares)	6,664
Vesting of restricted stock	$ 1	(1)			(4)		(4)
Foreign currency translation adjustments			(1,262)				$ (1,262)
Balance (in shares) at Jun. 30, 2022	20,567,460						16,132,868
Balance at Jun. 30, 2022	$ 2,057	$ 186,999	$ (3,151)	$ (47,488)	$ (21,480)	$ 130	$ 117,067