CONDENSED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 68,162,754	$ 22,261,372
Short-term investments	0	35,035,420
Receivables	1,000,839	4,593,475
Interest receivable	0	28,130
Prepaid expenses and other current assets	3,626,510	2,373,708
Total current assets	72,790,103	64,292,105
Equipment and furnishings, net	1,676,441	1,467,681
Goodwill	183,780	183,780
Other assets	689,325	1,080,872
Total assets	75,339,649	67,024,438
Current liabilities:
Accounts payable	5,959,998	8,058,624
Accrued expenses and other current liabilities	6,277,991	9,693,359
Non-cash litigation settlement due in shares of common stock	5,200,000	4,500,000
Warrant liability	877,729	693,457
Term Loan, net - current	534,142	0
Total current liabilities	18,849,860	22,945,440
Long term loan, net:	22,911,337	0
Total liabilities	$ 41,761,197	$ 22,945,440
Commitments and contingencies
Stockholders' equity:
Preferred Stock, $0.01 par value, 5,000,000 shares authorized, including 25,000 shares of Series A Junior Participating Preferred Stock; no shares issued and outstanding	$ 0	$ 0
Common stock, $0.001 par value, 250,000,000 shares authorized; 66,580,065 and 66,480,065 shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively	66,580	66,480
Additional paid-in capital	411,249,758	409,107,292
Accumulated deficit	(377,737,886)	(365,094,774)
Total stockholders' equity	33,578,452	44,078,998
Total liabilities and stockholders' equity	$ 75,339,649	$ 67,024,438