Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2015	18,868
Balance at Dec. 31, 2015	$ 77,628	$ 9,246	$ (69,146)	$ (28,667)	$ (10,939)
Share-based compensation	$ 504	186			690
Vested restricted stock issued (in shares)	29
Vested restricted stock issued	$ 186	(186)
Shares cancelled to pay tax liability (in shares)	(55)
Shares cancelled to pay tax liability	$ (293)				(293)
Other comprehensive income - pension				1,481	1,481
Net income			14,397		14,397
Share-based compensation (in shares)	99
Balance (in shares) at Sep. 30, 2016	18,941
Balance at Sep. 30, 2016	$ 78,025	9,246	(54,749)	(27,186)	5,336
Balance (in shares) at Dec. 31, 2016	18,958
Balance at Dec. 31, 2016	$ 78,123	9,246	(47,332)	(22,295)	17,742
Share-based compensation	$ 767	327			1,094
Vested restricted stock issued (in shares)	44
Vested restricted stock issued	$ 327	(327)
Shares cancelled to pay tax liability (in shares)	(65)
Shares cancelled to pay tax liability	$ (651)				(651)
Other comprehensive income - pension				612	612
Net income			11,829		11,829
Balance (in shares) at Sep. 30, 2017	19,031
Balance at Sep. 30, 2017	$ 78,566	$ 9,246	$ (35,503)	$ (21,683)	$ 30,626