CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 3,846	$ (22,399)	$ 10,514
Other comprehensive income (loss)
Cumulative translation adjustment, net	(5,516)	4,029	(2,488)
Pension adjustment, net of tax of $95 in 2018, $53 in 2017, and $509 in 2016	797	313	(1,736)
Comprehensive income (loss)	$ (873)	$ (18,057)	$ 6,290