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
Restricted stock units issued	(152)	$ 1	(153)
Restricted stock units issued, Shares		63,000
Share based compensation earned	597		597
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, 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	$ 6,670
Exercise of stock options, Shares	0
Translation gain (loss)	$ (1,093)
Ending Balance at Jun. 30, 2020	199,042	$ 355	254,323	(39,682)	(15,598)	$ (356)
Ending Balance, Shares at Jun. 30, 2020		35,493,000				(138,000)
Beginning Balance at Mar. 31, 2020	194,606	$ 354	254,313	(42,932)	(16,773)	$ (356)
Beginning Balance, Shares at Mar. 31, 2020		35,338,000				(138,000)
Net income	3,258			3,258
Restricted stock units issued	(151)	$ 1	(144)	(8)
Restricted stock units issued, Shares		155,000
Share based compensation earned	154		154
Translation gain (loss)	1,175				1,175
Ending Balance at Jun. 30, 2020	199,042	$ 355	254,323	(39,682)	(15,598)	$ (356)
Ending Balance, Shares at Jun. 30, 2020		35,493,000				(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
Exercise of stock options, Shares		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
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)
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	$ 1,680
Exercise of stock options, Shares	2,000
Translation gain (loss)	$ 345
Ending Balance at Jun. 30, 2021	206,833	$ 357	256,598	(36,667)	(14,151)	$ (356)	1,052
Ending Balance, Shares at Jun. 30, 2021		35,749,000				(138,000)
Beginning Balance at Mar. 31, 2021	205,651	$ 356	255,982	(36,960)	(14,441)	$ (356)	1,070
Beginning Balance, Shares at Mar. 31, 2021		35,568,000				(138,000)
Net income	382			293			89
Restricted stock units issued	(270)	$ 1	(271)
Restricted stock units issued, Shares		181,000
Share based compensation earned	887		887
Translation gain (loss)	290				290
Noncontrolling interest distribution	(107)						(107)
Ending Balance at Jun. 30, 2021	$ 206,833	$ 357	$ 256,598	$ (36,667)	$ (14,151)	$ (356)	$ 1,052
Ending Balance, Shares at Jun. 30, 2021		35,749,000				(138,000)