CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid in capital	Retained earnings	Accumulated other comprehensive income	Treasury stock
Beginning balance at Dec. 31, 2015	$ 38,564	$ 0	$ 40,494	$ 8,589	$ 686	$ (11,205)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Charge related to stock-based compensation	690		690
Release of restricted stock	0		(1,881)			1,881
Stock option exercises	39		(815)			854
Tax effect from exercise of stock options	(24)		(24)
Foreign currency translation	1,176				1,176
Pension obligations, net of tax of $15	(28)				(28)
Repurchase of common stock	(274)		(274)
Declared and paid dividends	(672)			(672)
Net loss	(586)			(586)
Ending balance at Dec. 31, 2016	38,885	0	38,190	7,331	1,834	(8,470)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Charge related to stock-based compensation	246		246
Release of restricted stock	0		(306)			306
Stock option exercises	83		(1,748)			1,831
Foreign currency translation	4,169				4,169
Pension obligations, net of tax of $15	(19)				(19)
Repurchase of common stock	(226)		(226)
Declared and paid dividends	(1,354)			(1,354)
Issuance of unrestricted shares	244		(1,228)			1,472
Net loss	(1,787)			(1,787)
Ending balance at Dec. 31, 2017	$ 40,241	$ 0	$ 34,928	$ 4,190	$ 5,984	$ (4,861)