CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit[Member]
Beginning Balance at Dec. 31, 2013	$ 53,980,890	$ 95,815	$ 119,410,777	$ (65,525,702)
Beginning Balance, Shares at Dec. 31, 2013		95,814,565
Stock-based compensation	1,637,022		1,637,022
Sale of common stock and warrants, net of issuance costs, Value	$ 18,577,018	$ 10,192	18,566,826
Sale of common stock and warrants, net of issuance costs, Shares	15,786,739	10,192,500
Note and accrued interest conversions, Value	$ 11,130,261	$ 5,574	11,124,687
Note and accrued interest conversions, Shares	5,573,831	5,573,831
Common stock issued for services, Value	$ 50,000	$ 20	49,980
Common stock issued for services, Shares	20,408	20,408
Net loss	$ (9,897,678)			(9,897,678)
Ending Balance at Dec. 31, 2014	75,477,513	$ 111,601	150,789,292	(75,423,380)
Ending Balance, Shares at Dec. 31, 2014		111,601,304
Stock-based compensation	$ 1,350,387		1,350,387
Sale of common stock and warrants, net of issuance costs, Shares	186,921
Shares issued for vested restricted stock units, Value		$ 57	(57)
Shares issued for vested restricted stock units, Shares	56,500	56,500
Shares issued for Employee Stock Purchase Plan options, Value	$ 110,066	$ 130	109,936
Shares issued for Employee Stock Purchase Plan options, Shares	130,421	130,421
Net loss	$ (7,445,930)			(7,445,930)
Ending Balance at Dec. 31, 2015	$ 69,492,036	$ 111,788	$ 152,249,558	$ (82,869,310)
Ending Balance, Shares at Dec. 31, 2015		111,788,225