Long-Term Debt (Details Textual) (USD $)	12 Months Ended			1 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Aug. 31, 2010	Dec. 31, 2010
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt	$ 0	$ 0	$ (992,281)
Interest Paid	0	0	655,834
Mid Cap Financial and Silicon Valley Bank [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					15,000,000
Proceeds from Bank Debt					10,000,000	5,000,000
Gains (Losses) on Extinguishment of Debt				992,000
Prepayment Penalty Rate				5.00%
Prepayment Penalty Amount				615,000
Debtor Reorganization Items, Write-off of Deferred Financing Costs and Debt Discounts				377,000
Warrants Issued to Acquire Number of Convertible Preferred Stock						64,674
Fair Value of Preferred Stock Warrants Issued						$ 219,322