Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Loss [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2019	$ 193,017	$ 353	$ 253,869	$ (46,344)	$ (14,505)	$ (356)
Beginning Balance, Shares at Dec. 31, 2019		35,275,000				(138,000)
Net income	$ 3,412			3,412
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0
Restricted stock units issued	$ (152)	$ (1)	(153)
Restricted stock units issued, Shares		63,000
Share based compensation earned	597		597
Foreign currency translation gain (loss)	(2,268)				(2,268)
Ending Balance at Mar. 31, 2020	194,606	$ 354	254,313	(42,932)	(16,773)	$ (356)
Ending Balance, Shares at Mar. 31, 2020		35,338,000				(138,000)
Beginning Balance at Dec. 31, 2020	203,611	$ 355	255,296	(38,141)	(14,496)	$ (356)	$ 953
Beginning Balance, Shares at Dec. 31, 2020		35,505,000				(138,000)
Net income	1,298			1,181			117
Exercise of stock options	$ 13		13
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	2,000	2,000
Restricted stock units issued	$ (133)	$ (1)	(134)
Restricted stock units issued, Shares		40,000
Share based compensation earned	807		807
Share based compensation earned, Shares		21,000
Foreign currency translation gain (loss)	55				55
Ending Balance at Mar. 31, 2021	$ 205,651	$ 356	$ 255,982	$ (36,960)	$ (14,441)	$ (356)	$ 1,070
Ending Balance, Shares at Mar. 31, 2021		35,568,000				(138,000)