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, 2018	20,053,335
Balance at Dec. 31, 2018	$ 2,005	$ 182,630	$ (2,786)	$ (58,035)	$ (19,266)	$ (85)	$ 104,463
Net income				425		24	449
Share repurchases					(1,957)		(1,957)
Stock option exercises (in shares)	75,427
Stock option exercises	$ 8	348					356
Stock-based compensation – stock options		174					174
Stock-based compensation – restricted stock		11					11
Tax withholdings on restricted stock					(8)		(8)
Foreign currency translation adjustments			435				435
Balance (in shares) at Mar. 31, 2019	20,134,596
Balance at Mar. 31, 2019	$ 2,013	183,163	(2,351)	(57,610)	(21,231)	(61)	$ 103,923
Balance (in shares) at Dec. 31, 2019	20,268,050						15,866,868
Balance at Dec. 31, 2019	$ 2,026	184,292	(2,531)	(52,830)	(21,231)	24	$ 109,750
Net income				1,059		15	$ 1,074
Stock option exercises (in shares)	7,633						7,633
Stock option exercises	$ 1	28					$ 29
Stock-based compensation – stock options		192					192
Stock-based compensation – restricted stock		38					38
Tax withholdings on restricted stock	$ 1				(8)		(7)
Foreign currency translation adjustments			(807)				$ (807)
Stock-based compensation – restricted stock (in shares)	5,833
Balance (in shares) at Mar. 31, 2020	20,281,516						15,879,284
Balance at Mar. 31, 2020	$ 2,028	$ 184,550	$ (3,338)	$ (51,771)	$ (21,239)	$ 39	$ 110,269