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, 2016	18,958
Balance at Dec. 31, 2016	$ 78,123	$ 9,246	$ (47,332)	$ (22,295)	$ 17,742
Share-based compensation (in shares)	94
Share-based compensation	$ 767	207			974
Vested restricted stock issued (in shares)	29
Vested restricted stock issued	$ 207	(207)
Shares cancelled to pay tax liability (in shares)	(59)
Shares cancelled to pay tax liability	$ (568)				(568)
Other comprehensive income - pension				408	408
Net income (loss)			12,313		12,313
Balance (in shares) at Jun. 30, 2017	19,022
Balance at Jun. 30, 2017	$ 78,529	9,246	(35,019)	(21,887)	30,869
Balance (in shares) at Dec. 31, 2017	19,040
Balance at Dec. 31, 2017	$ 78,584	9,246	(36,432)	(20,254)	31,144
Share-based compensation (in shares)	71
Share-based compensation	$ 845	268			1,113
Vested restricted stock issued (in shares)	31
Vested restricted stock issued	$ 268	(268)
Shares cancelled to pay tax liability (in shares)	(39)
Shares cancelled to pay tax liability	$ (467)				(467)
Other comprehensive income - pension				370	370
Net income (loss)			(1,534)		(1,534)
Balance (in shares) at Jun. 30, 2018	19,103
Balance at Jun. 30, 2018	$ 79,230	$ 9,246	$ (37,966)	$ (19,884)	$ 30,626