Derivative Financial Instruments (Details Textual) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 29, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 29, 2015	Jul. 28, 2015
Debt Instrument, Additional Borrowings		$ 5.0		$ 5.0
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		275,000		275,000
Fair Value Adjustment of Warrants			$ 3.1	$ 3.1
Warrants and Rights Outstanding		$ 0.2		0.2
March 2014 Warrants [Member]
Fair Value Adjustment of Warrants			$ 2.3		$ 0.5
Hercules Technology Growth Capital, Inc. [Member]
Long-term Debt, Gross	$ 4.5						$ 4.5
Debt Instrument, Additional Borrowings	$ 5.0						$ 5.0
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	214,853
Additional Warrants to be Issued	279,412
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 1.70
Warrants Not Settleable in Cash, Fair Value Disclosure	$ 0.3
Fair Value Adjustment of Warrants	$ 0.1	0.1		0.2
Warrants and Rights Outstanding						$ 0.2
Series D Preferred Stock [Member]
Credit Risk Derivatives, at Fair Value, Net, Total		8.0		8.0
Decrease In fair Value Of Preferred Stock				0.6
Derivative Liability, Fair Value, Gross Liability		0.3		0.3
Credit Risk Derivative Liabilities, at Fair Value		$ 7.6		$ 7.6