Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 13,130,795	$ 12,518,980
Short-term investments	5,017,453	15,007,478
Trade and other receivables	19,159	225,524
Deferred financing fees, current portion	107,096	135,694
Prepaid expenses	1,289,195	274,106
Total current assets	19,563,698	28,161,782
Property and equipment, net	335,863	301,265
Patents, net	1,147,153	1,233,172
Deferred financing fees, net of current portion	22,825	89,143
Other assets	72,163	58,713
Total assets	21,141,702	29,844,075
CURRENT LIABILITIES
Accounts payable and accrued expenses	2,036,769	2,504,978
Accrued bonuses	767,989	646,960
Current portion of long-term debt, net of discount	4,457,768	730,012
Other current liabilities	207,292	126,745
Total current liabilities	7,469,818	4,008,695
Long-term debt, net of discount and current portion	4,625,394	8,056,470
Other long-term liabilities	143,730	59,574
Total liabilities	$ 12,238,942	$ 12,124,739
Commitments and contingencies (Note 6)
STOCKHOLDERS' EQUITY
Preferred stock, 7,000,000 shares authorized, zero shares issued and outstanding	$ 0	$ 0
Common stock, $0.01 par value; 300 million shares authorized, 91,786,290 and 87,789,679 shares outstanding in 2015 and 2014, respectively	917,863	877,897
Additional paid-in capital	175,174,708	167,890,220
Accumulated other comprehensive income	3,720	6,000
Accumulated deficit	(167,193,531)	(151,054,781)
Total stockholders' equity	8,902,760	17,719,336
Total liabilities and stockholders' equity	$ 21,141,702	$ 29,844,075