Condensed Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income
Beginning balance at Dec. 31, 2017	$ 154,496	$ 111	$ 45,017	$ 145,797	$ (18,662)	$ (17,767)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(1,858)			(1,858)
Other comprehensive income, net of tax:
Pension liability adjustment	114					114
Foreign currency translation adjustment	24					24
Unrealized derivative gain on cash flow hedges	738					738
Issuance of common shares, net of share withheld for taxes	(310)		(792)		482
Stock-based compensation	1,082		1,082
Ending balance at Mar. 31, 2018	153,981	111	45,307	143,634	(18,180)	(16,891)
Beginning balance at Dec. 31, 2018	122,119	111	48,040	114,324	(18,165)	(22,191)
Increase (Decrease) in Stockholders' Equity
Adjustment to adopt ASU 2018-02 | ASU 2018-02				633		(633)
Net income (loss)	3,690			3,690
Other comprehensive income, net of tax:
Pension liability adjustment	93					93
Foreign currency translation adjustment	1,053					1,053
Unrealized derivative gain 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)