Condensed Consolidated Statement of Stockholders' Equity (Deficit) (Unaudited) (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Series A Preferred Stock [Member]
Beginning Balance at Dec. 31, 2013	$ (812,351)	$ 38,204	$ 150,506,927	$ (47,183)	$ (151,313,008)	$ 2,709
Beginning Balance, shares at Dec. 31, 2013		38,204,384				2,709,300
Stock-based compensation	4,857,230	0	4,857,230	0	0	0
Restricted stock awards	0	474	(474)	0	0	0
Restricted stock awards, shares		473,893				0
Exercise of stock options	4,572,919	1,331	4,571,588	0	0	0
Exercise of stock options, shares	1,337,878	1,331,063				0
Exercise of warrants	4,930,796	1,099	4,929,697	0	0	0
Exercise of warrants, shares		1,099,012				0
Cashless exercise of warrants	0	219	(219)	0	0	0
Cashless exercise of warrants, shares		218,367				0
Shares issued pursuant to registered direct offering, net	58,181,172	7,500	58,173,672	0	0	0
Shares issued pursuant to registered direct offering, shares		7,500,000				0
Shares issued pursuant to an at the market offering, net	12,536,614	1,188	12,535,426	0	0	0
Shares issued pursuant to an at the market offering, shares		1,187,499				0
Warrant derivative liability reclassified to equity	6,366,440	0	6,366,440	0	0	0
Short swing profit return	82,337	0	82,337	0	0	0
Conversion of preferred shares to common shares	0	570	0	0	0	(570)
Conversion of preferred shares to common shares, shares		570,300				(570,300)
Net loss	(36,572,038)	0	0	0	(36,572,038)	0
Ending Balance at Sep. 30, 2014	$ 54,143,119	$ 50,585	$ 242,022,624	$ (47,183)	$ (187,885,046)	$ 2,139
Ending Balance, shares at Sep. 30, 2014		50,584,518				2,139,000