CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Total
BALANCE at Dec. 31, 2017	$ 141,377	$ 29,334	$ (82,860)	$ (37,528)	$ (4,510)	$ 45,813
BALANCE (in shares) at Dec. 31, 2017	30,624,407
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(6,874)	0	(6,874)
Employee pension plan adjustments	0	0	0	0	162	162
Stock-based compensation expense
Restricted stock	$ 0	429	0	0	0	429
Restricted stock (in shares)	113,946
Net share settlement for equity-based compensation	$ 0	(311)	0	0	0	(311)
Net share settlement for equity-based compensation (in shares)	(168,254)
BALANCE at Mar. 31, 2018	$ 141,377	29,452	(82,860)	(44,402)	(4,348)	39,219
BALANCE (in shares) at Mar. 31, 2018	30,570,099
BALANCE at Dec. 31, 2018	$ 141,377	29,484	(82,860)	(44,073)	(4,062)	$ 39,866
BALANCE (in shares) at Dec. 31, 2018	30,552,333					30,552,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(5,467)	0	$ (5,467)
Employee pension plan adjustments	0	0	0	0	154	154
Stock-based compensation expense
Restricted stock	$ 0	52	0	0	0	52
Restricted stock (in shares)	478,853
Net share settlement for equity-based compensation	$ 0	(18)	0	0	0	(18)
Net share settlement for equity-based compensation (in shares)	(5,518)
BALANCE at Mar. 31, 2019	$ 141,377	$ 29,518	$ (82,860)	$ (49,540)	$ (3,908)	$ 34,587
BALANCE (in shares) at Mar. 31, 2019	31,025,668					31,025,668