CONDENSED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 48,003,315	$ 56,959,485
Receivables	102,129	183,703
Prepaid expenses and other current assets	2,650,682	3,434,238
Total current assets	50,756,126	60,577,426
Equipment and furnishings, net	1,903,904	1,959,667
Goodwill	183,780	183,780
Other assets	43,264	48,911
Total assets	52,887,074	62,769,784
Current liabilities:
Accounts payable	6,542,281	6,406,445
Accrued expenses and other current liabilities	3,793,159	3,830,498
Warrant liabilities	3,821,510	3,789,391
Term loan, net - current	6,481,674	5,481,656
Total current liabilities	20,638,624	19,507,990
Long term loan, net	17,586,113	18,484,510
Total liabilities	38,224,737	37,992,500
Commitments and contingencies
Stockholders' equity:
Common stock, $0.001 par value, 250,000,000 shares authorized; 118,722,895 and 111,322,895 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively	118,721	111,321
Additional paid-in capital	441,453,715	437,423,958
Accumulated deficit	(426,910,099)	(415,865,995)
Total stockholders' equity	14,662,337	24,777,284
Total liabilities and stockholders' equity	52,887,074	62,769,784
Series A Junior Participating Preferred Stock [Member]
Stockholders' equity:
Preferred Stock	0	0
Series B Convertible Preferred Shares [Member]
Stockholders' equity:
Preferred Stock	$ 0	$ 3,108,000