Condensed Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity
Adjustment to adopt ASU 2018-02	$ 0			$ 633		$ (633)
Beginning balance at Dec. 31, 2018	122,119	$ 111	$ 48,040	114,324	$ (18,165)	(22,191)
Increase (Decrease) in Stockholders' Equity
Net (loss) income	3,690			3,690
Other comprehensive loss, net of tax:
Pension liability adjustment	93					93
Foreign currency translation adjustment	1,053					1,053
Unrealized derivative loss on cash flow hedges	(26)					(26)
Issuance of common shares, net of share withheld for taxes	(526)		(1,495)		969
Stock-based compensation	855		855
Ending balance at Mar. 31, 2019	127,258	111	47,400	118,647	(17,196)	(21,704)
Beginning balance at Dec. 31, 2019	169,862	111	49,204	157,525	(16,795)	(20,183)
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(1,866)			(1,866)
Other comprehensive loss, net of tax:
Pension liability adjustment	58					58
Foreign currency translation adjustment	(3,707)					(3,707)
Unrealized derivative loss on cash flow hedges	(864)					(864)
Issuance of common shares, net of share withheld for taxes	(1,657)		(5,556)		3,899
Stock-based compensation	680		680
Ending balance at Mar. 31, 2020	$ 162,506	$ 111	$ 44,328	$ 155,659	$ (12,896)	$ (24,696)