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, 2011	$ (11,423,231)	$ 5,000	$ 36,710	$ 91,111,640	$ (102,576,581)
Beginning Balance (in shares) at Dec. 31, 2011		5,000,000	36,709,706
Net loss	(5,120,084)	0	0	0	(5,120,084)
Private placement of preferred stock, net of offering costs of $386,030 (in shares)		500,000	0
Private placement of preferred stock, net of offering costs of $386,030	2,613,970	500	0	2,613,470	0
Warrants issued in connection with private placement of preferred stock	104,907	0	0	104,907	0
Conversion of convertible debt	0
Common stock issued:
Employee stock purchase plan (in shares)		0	52,158
Employee stock purchase plan	8,810	0	52	8,758	0
Common stock issued: Exercise of stock options (in shares)	0
Stock-based compensation expense	191,828	0	0	191,828	0
Ending Balance at Dec. 31, 2012	(13,623,800)	5,500	36,762	94,030,603	(107,696,665)
Ending 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 common stock, net of offering costs of $1,735,000 (in shares)		0	43,715,847
Private placement of common stock, net of offering costs of $1,735,000	11,308,920	0	43,716	11,265,204	0
Conversion of preferred stock (in shares)		(5,500,000)	39,089,161
Conversion of preferred stock	0	(5,500)	39,089	(33,589)	0
Conversion of convertible debt (in shares)	2,521,222	0	2,521,222
Conversion of convertible debt	14,316,255	0	2,521	14,313,734	0
Common stock issued:
Employee stock purchase plan (in shares)		0	111,113
Employee stock purchase plan	31,453	0	111	31,342	0
Common stock issued: Exercise of stock options	80,520	0	252	80,268	0
Common stock issued: Exercise of stock options (in shares)	252,000	0	252,000
Cancellation of restricted stock (in shares)		0	(2,500)
Cancellation of restricted stock	0	0	(2)	2	0
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