Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended														12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014	Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues	$ 44,077	$ 44,780		$ 47,049		$ 48,687		$ 48,174	$ 50,805		$ 49,964		$ 43,799		$ 184,593	$ 192,742	$ 237,863
Gross Profit	13,918	13,007		12,601		12,626		13,950	14,697		12,007		11,148		52,152	51,802	64,138
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(1,523)	(2,016)	[1]	(3,533)	[1]	(6,993)	[1]	(4,304)	(4,103)	[1]	(7,429)	[1]	(9,464)	[1]	(12,936)	(25,089)	(34,449)
Net income (loss)	$ (1,440)	$ (2,066)	[1]	$ (4,119)	[1]	$ (7,053)	[1]	$ (4,467)	$ (4,469)	[1]	$ (8,211)	[1]	$ (10,434)	[1]	$ (14,678)	$ (27,581)	$ (49,404)
Earnings Per Share, Basic	$ (0.04)	$ (0.06)		$ (0.11)		$ (0.19)		$ (0.12)	$ (0.12)		$ (0.23)		$ (0.35)		$ (0.40)	$ (0.79)	$ (1.72)
Earnings Per Share, Diluted	$ (0.04)	$ (0.06)		$ (0.11)		$ (0.19)		$ (0.12)	$ (0.12)		$ (0.23)		$ (0.35)		$ (0.40)	$ (0.79)	$ (1.72)
Valuation Allowance, Deferred Tax Asset, Change in Amount															$ 0	$ 0	$ (12,476)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal															$ 0	$ 0	$ 1,532

[1] For the Year Ended December 31, 2015 For the Year Ended December 31, 2014 FirstQuarter SecondQuarter ThirdQuarter FourthQuarter FirstQuarter SecondQuarter ThirdQuarter FourthQuarter (In thousands, except per share data)Revenues$48,687 $47,049 $44,780 $44,077 $43,799 $49,964 $50,805 $48,174Gross margin12,626 12,601 13,007 13,918 11,148 12,007 14,697 13,950Loss from operations(6,993) (3,533) (2,016) (1,523) (9,464) (7,429) (4,103) (4,304)Net loss(7,053) (4,119) (2,066) (1,440) (10,434) (8,211) (4,469) (4,467)Loss per share: Basic$(0.19) $(0.11) $(0.06) $(0.04) $(0.35) $(0.23) $(0.12) $(0.12)Diluted$(0.19) $(0.11) $(0.06) $(0.04) $(0.35) $(0.23) $(0.12) $(0.12)