STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2012	$ (13,623,800)	$ 5,500	$ 36,762	$ 94,030,603	$ (107,696,665)
Beginning Balance (in shares) at Dec. 31, 2012		5,500,000	36,761,864
Net loss	(7,057,933)	0	0	0	(7,057,933)
Private placement of stock, net of offering costs	11,308,920	0	43,716	11,265,204	0
Private placement of common stock, net of offering costs (in shares)		0	43,715,847
Conversion of preferred stock	0	(5,500)	39,089	(33,589)	0
Conversion of preferred stock (in shares)		(5,500,000)	39,089,161
Conversion of convertible debt	14,316,255	0	2,521	14,313,734
Conversion of convertible debt (in shares)		0	2,521,222
Common stock issued:
Exercise of stock options	80,520	0	252	80,268	0
Exercise of stock options (in shares)	252,000	0	252,000
Cancellation of restricted stock	0	0	(2)	2	0
Cancellation of restricted stock (in shares)		0	(2,500)
Employee stock purchase plan	31,453	0	111	31,342	0
Employee stock purchase plan (in shares)		0	111,113
Stock-based compensation expense	197,807	0	0	197,807	0
Ending Balance at Dec. 31, 2013	5,253,222	0	122,449	119,885,371	(114,754,598)
Ending Balance (in shares) at Dec. 31, 2013		0	122,448,707
Net loss	(6,335,714)	0	0	0	(6,335,714)
Private placement of stock, net of offering costs	4,806,874	0	50,100	4,756,774	0
Private placement of common stock, net of offering costs (in shares)		0	50,099,700
Conversion of convertible debt	0
Warrants issued in connection with long term debt	261,386	0	0	261,386	0
Common stock issued:
Exercise of stock options (in shares)	0
Employee stock purchase plan	32,154	0	137	32,017	0
Employee stock purchase plan (in shares)		0	134,935
Stock-based compensation expense	498,935	0	0	498,935	0
Ending Balance at Dec. 31, 2014	$ 4,516,857	$ 0	$ 172,686	$ 125,434,483	$ (121,090,312)
Ending Balance (in shares) at Dec. 31, 2014		0	172,683,342