CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net income (loss)	$ (5,455)	$ 7,864	$ 3,044
Other comprehensive loss
Cumulative translation adjustment, net of tax	4,534	1,543	(5,516)
Pension adjustment, net of tax	(1,459)	(1,551)	797
Comprehensive income (loss)	$ (2,380)	$ 7,856	$ (1,675)