Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2013	$ (63,190)	$ 51	$ 283,673	$ (12,147)	$ (2,072)	$ (332,695)
Beginning balance, shares at Dec. 31, 2013		51,208,000		(6,166,000)
Issuance of restricted stock	2		2
Issuance of restricted stock, shares		2,000
Stock-based compensation and expense	509		509
Exercise of stock options and warrants	53	$ 1	59	$ (7)
Exercise of stock options and warrants, shares		796,000		(5,000)
Stock repurchases	(630)			$ (630)
Stock repurchases, shares				(361,000)
Net loss	(9,955)					(9,955)
Pension plan	(1,844)				(1,844)
Ending balance at Dec. 31, 2014	$ (75,055)	$ 52	284,243	$ (12,784)	(3,916)	(342,650)
Ending balance, shares at Dec. 31, 2014	45,474,000	52,006,000		(6,532,000)
Stock-based compensation and expense	$ 687		687
Exercise of stock options and warrants	$ 376		376
Exercise of stock options and warrants, shares	262,183	262,000
Net loss	$ (1,325)					(1,325)
Pension plan	1,148				1,148
Ending balance at Dec. 31, 2015	$ (74,169)	$ 52	$ 285,306	$ (12,784)	$ (2,768)	$ (343,975)
Ending balance, shares at Dec. 31, 2015	45,735,818	52,268,000		(6,532,000)