CONDENSED STATEMENTS OF STOCKHOLDERS' DEFICIT (USD $)	Total	Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2014	$ 4,516,857	$ 0	$ 172,686	$ 125,434,483	$ (121,090,312)
Balance (in shares) at Dec. 31, 2014		0	172,683,342
Net loss	(1,843,195)	0	0	0	(1,843,195)
Common stock issued:
Private placement	(4,100)	0	0	(4,100)	0
Private placement (in shares)		0	0
Employee stock purchase plan	5,481	0	54	5,427	0
Employee stock purchase plan (in shares)		0	54,820
Stock-based compensation expense	146,310	0	0	146,310	0
Balance at Mar. 31, 2015	$ 2,821,353	$ 0	$ 172,740	$ 125,582,120	$ (122,933,507)
Balance (in shares) at Mar. 31, 2015		0	172,738,162