CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (USD $)	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Beginning balance, Value at Dec. 31, 2012	$ 30,160	$ 44,374	$ 104,058,087	$ (93,902,015)	$ 10,230,606
Beginning balance, Shares at Dec. 31, 2012	3,015,974	4,437,346
Proceeds from issuance of Common Stock and warrants, net, Value		61,963	21,902,607		21,964,570
Proceeds from issuance of Common Stock and warrants, net, Shares		6,196,605
Fair value of Common Stock issued for services, Value		92	96,283		96,375
Fair value of Common Stock issued for services, Shares		9,122
Proceeds from issuance of Common Stock, Series E Preferred Stock and warrants, net of cash issuance cost, Value	17,486	696	4,881,818		4,900,000
Proceeds from issuance of Common Stock, Series E Preferred Stock and warrants, net of cash issuance cost, Shares	1,748,613	69,569
Issuance of Series C and D Preferred Stock and warrants, net of cash issuance costs, Value	(20,150)	10,980	9,170
Issuance of Series C and D Preferred Stock and warrants, net of cash issuance costs, Shares	(2,014,974)	1,098,019
Share-based compensation, net of restricted stock cancellations, Value		(341)	1,244,683		1,244,342
Share-based compensation, net of restricted stock cancellations, Shares		(34,083)
Net Loss				(19,067,397)	(19,067,397)
Ending Balance at Dec. 31, 2013	27,496	117,764	132,192,648	(112,969,412)	19,368,496
Ending Balance, Shares at Dec. 31, 2013	2,749,613	11,776,578
Proceeds from issuance of Common Stock and warrants, net, Value		8,727	2,341,273		2,350,000
Proceeds from issuance of Common Stock and warrants, net, Shares		872,728
Fair value of Common Stock issued for services, Value		26	8,378		8,404
Fair value of Common Stock issued for services, Shares		2,636
Issuance of Series F Preferred Stock and warrants, net of cash issuance costs, Value	8,403		934,993		943,396
Issuance of Series F Preferred Stock and warrants, net of cash issuance costs, Shares	840,336
Capital contribution			440,675		440,675
Share-based compensation, net of restricted stock cancellations, Value		(222)	1,374,190		1,373,968
Share-based compensation, net of restricted stock cancellations, Shares		(22,247)
Net Loss				(14,962,654)	(14,962,654)
Ending Balance at Dec. 31, 2014	$ 35,899	$ 126,295	$ 137,292,157	$ (127,932,066)	$ 9,522,285
Ending Balance, Shares at Dec. 31, 2014	3,589,949	12,629,695