CONDENSED 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	(2,977,891)	0	0	0	(2,977,891)
Private placement of common stock, net of offering costs	6,000,410	0	43,716	5,956,694	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)	2,000	0	2,000
Exercise of stock options	520	0	2	518	0
Employee stock purchase plan (in shares)		0	50,624
Employee stock purchase plan	12,839	0	51	12,788	0
Stock-based compensation expense	60,284	0	0	60,284	0
Ending Balance at Jun. 30, 2013	3,788,617	0	122,141	114,341,032	(110,674,556)
Ending Balance (in shares) at Jun. 30, 2013		0	122,140,718
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	(3,241,166)	0	0	0	(3,241,166)
Common stock issued:
Employee stock purchase plan (in shares)		0	67,610
Employee stock purchase plan	19,244	0	69	19,175	0
Stock-based compensation expense	244,799	0	0	244,799	0
Ending Balance at Jun. 30, 2014	$ 2,276,099	$ 0	$ 122,518	$ 120,149,345	$ (117,995,764)
Ending Balance (in shares) at Jun. 30, 2014		0	122,516,317