CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statement - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income (loss)	$ (2,941)	$ (8,790)	$ 2,329
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	3,844	(3,333)	(3,326)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(66)	(28)	5
Other Comprehensive Income (Loss), Net of Tax	3,778	(3,361)	(3,321)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 837	$ (12,151)	$ (992)