CONDENSED STATEMENTS OF STOCKHOLDERS' DEFICIT (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	(5,153,948)				(5,153,948)
Private placement of common 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	0
Conversion of convertible debt (in shares)		0	2,521,222
Common stock issued:
Exercise of stock options (in shares)	252,000	0	252,000
Exercise of stock options	80,520	0	252	80,268	0
Cancellation of restricted stock (in shares)		0	(2,500)
Cancellation of restricted stock	0	0	(2)	2	0
Employee stock purchase plan (in shares)		0	79,496
Employee stock purchase plan	23,232	0	79	23,153	0
Stock-based compensation expense	84,608	0	0	84,608	0
Ending Balance at Sep. 30, 2013	7,035,787	0	122,417	119,763,983	(112,850,613)
Ending Balance (in shares) at Sep. 30, 2013		0	122,417,090
Beginning Balance at Dec. 31, 2013	5,253,222	0	122,449	119,885,371	(114,754,598)
Beginning Balance (in shares) at Dec. 31, 2013		0	122,448,707
Net loss	(4,697,931)	0	0	0	(4,697,931)
Conversion of convertible debt	14,300,000
Conversion of convertible debt (in shares)	2,521,222
Common stock issued:
Employee stock purchase plan (in shares)			99,585
Employee stock purchase plan	27,557		101	27,456
Stock-based compensation expense	354,441	0	0	354,441	0
Ending Balance at Sep. 30, 2014	$ 937,289	$ 0	$ 122,550	$ 120,267,268	$ (119,452,529)
Ending Balance (in shares) at Sep. 30, 2014		0	122,548,292