Condensed Consolidated Statements of Stockholders' (Deficit) (Unaudited) (USD $)	Preferred Stock [Member]	Common Stock [Member] USD ($)	Additional Paid-In Capital [Member] USD ($)	Accumulated Deficit [Member] USD ($)	Total USD ($)
Balance at Dec. 31, 2011		$ 8,200	$ 61,398,600	$ (60,689,200)
Balance (in shares) at Dec. 31, 2011	0	81,886,926
Exercise of employee stock options		400
Employee stock option issuances (in shares)		567,176
Exercise of warrants		0
Exercise of warrants (in shares)		0
Vesting of restricted stock awards		0
Vesting of restricted stock awards (in shares)		0
Stock-based compensation expense			521,600
Stock-based compensation expense - severance agreement			237,400
Proceeds from exercise of employee stock options			44,000		44,400
Proceeds from exercise of warrants			0		0
Issuance of new warrants, per exercise agreement			0
New warants recorded as cost of exercise agreement			0
Issuance of new warrants, per offer to exercise			0
New warrants recorded as cost of offer to exercise			0
Accretion of compensation expense - consultant warrants			0
Reclassification of warrants liability to equity from the exercise of warrants			0
Reclassification of warrants liability to equity from amendment of warrants			0
Net loss				(6,309,900)	(6,309,900)
Balance at Sep. 30, 2012		8,600	62,201,600	(66,999,100)	(4,788,900)
Balance (in shares) at Sep. 30, 2012	0	82,454,102
Balance at Dec. 31, 2012		8,300	62,425,400	(68,865,900)	(6,432,200)
Balance (in shares) at Dec. 31, 2012	0	82,616,750
Exercise of employee stock options		100
Employee stock option issuances (in shares)		1,459,972
Exercise of warrants		900
Exercise of warrants (in shares)		10,222,500
Vesting of restricted stock awards		200
Vesting of restricted stock awards (in shares)		1,208,412
Stock-based compensation expense			617,000
Stock-based compensation expense - severance agreement			0
Proceeds from exercise of employee stock options			302,600		302,700
Proceeds from exercise of warrants			2,614,400		2,615,300
Issuance of new warrants, per exercise agreement			514,800
New warants recorded as cost of exercise agreement			(514,800)
Issuance of new warrants, per offer to exercise			45,600
New warrants recorded as cost of offer to exercise			(45,600)
Accretion of compensation expense - consultant warrants			11,800
Reclassification of warrants liability to equity from the exercise of warrants			385,900		(385,900)	[1]
Reclassification of warrants liability to equity from amendment of warrants			4,391,000		(4,391,000)	[1]
Net loss				(2,850,200)	(2,850,200)
Balance at Sep. 30, 2013		$ 9,500	$ 70,748,100	$ (71,716,100)	$ (958,500)
Balance (in shares) at Sep. 30, 2013	0	95,507,634

[1] During the nine-month period ended September 30, 2013, our warrants liability was reduced as a result of the warrants amendment, as discussed above. Additionally, our warrants liability was further reduced by $385,900 as a result of the exercise of 1,072,500 warrants during such period, whose terms were not affected by the changes made under the warrants amendment. The aggregate reduction in the liability, combining the warrant amendment and this exercise, was $4,776,900. See Note 14.