CONDENSED STATEMENTS OF STOCKHOLDERS' DEFICIT (USD $)	Total	ConvertiblePreferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning Balance at Dec. 31, 2009	$ (5,764,628)	$ 5,000	$ 32,102	$ 85,763,379	$ (91,565,109)
Beginning Balance (in shares) at Dec. 31, 2009		5,000,000	32,102,435
Net loss	(4,818,387)				(4,818,387)
Common stock issued:
Private placement, net of offering costs of $365,329 (in shares)			4,375,002
Private placement, net of offering costs of $365,329	4,884,674		4,375	4,880,299
Exercise of stock option (in shares)			1,300
Exercise of stock option	338		2	336
Employee stock purchase plan (in shares)			72,278
Employee stock purchase plan	33,980		72	33,908
Stock-based compensation expense	137,738			137,738
Ending Balance at Sep. 30, 2010	(5,526,285)	5,000	36,551	90,815,660	(96,383,496)
Ending Balance (in shares) at Sep. 30, 2010		5,000,000	36,551,015
Beginning Balance at Dec. 31, 2010	(6,658,096)	5,000	36,594	90,851,709	(97,551,399)
Beginning Balance (in shares) at Dec. 31, 2010		5,000,000	36,594,799
Net loss	(3,602,520)				(3,602,520)
Common stock issued:
Employee stock purchase plan (in shares)			89,457
Employee stock purchase plan	25,574		90	25,484
Stock-based compensation expense	179,680			179,680
Ending Balance at Sep. 30, 2011	$ (10,055,362)	$ 5,000	$ 36,684	$ 91,056,873	$ (101,153,919)
Ending Balance (in shares) at Sep. 30, 2011		5,000,000	36,684,256