Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 13,730	$ 7,639	$ 4,125
Foreign currency translation adjustment	(4,052)	5,461	(1,084)
Decrease (increase) in pension loss, net of taxes of $6, $(156), and $(92), in 2021, 2020 and 2019, respectively	2,479	(2,286)	(2,847)
Other comprehensive income (loss)	(1,573)	3,175	(3,931)
Comprehensive income	$ 12,157	$ 10,814	$ 194