Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 7,620,746	$ 4,716,533
Short-term investments	0	7,517,453
Trade and other receivables	39,167	37,316
Prepaid expenses	1,077,762	1,159,782
Total current assets	8,737,675	13,431,084
Property and equipment, net	336,974	343,200
Patents, net	1,066,577	1,103,467
Other assets	57,692	71,797
Total assets	10,198,918	14,949,548
CURRENT LIABILITIES
Accounts payable and accrued expenses	2,627,137	1,455,826
Accrued bonuses	287,046	161,362
Current portion of long term debt, net of fees and discount	4,466,081	4,634,742
Other current liabilities	241,008	173,542
Total current liabilities	7,621,272	6,425,472
Long term debt, net of fees, discount and current portion	2,546,296	3,391,808
Other long term liabilities	200,739	164,990
Total liabilities	10,368,307	9,982,270
STOCKHOLDERS' EQUITY (DEFICIT)
Preferred stock, 7,000,000 shares authorized, zero shares issued and outstanding	0	0
Common stock, $0.01 par value; 300 million shares authorized, 92,044,042 and 92,005,705 shares outstanding in 2016 and 2015, respectively	920,440	920,057
Additional paid-in capital	177,473,335	176,002,832
Accumulated other comprehensive income	1,298	3,071
Accumulated deficit	(178,564,462)	(171,958,682)
Total stockholders' equity (deficit)	(169,389)	4,967,278
Total liabilities and stockholders' equity (deficit)	$ 10,198,918	$ 14,949,548