CONDENSED BALANCE SHEETS (Unaudited) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 55,913,199	$ 22,261,372
Short-term investments	0	35,035,420
Receivables	224,702	4,621,605
Prepaid expenses and other current assets	1,337,068	2,373,708
Total current assets	57,474,969	64,292,105
Equipment and furnishings, net	1,990,334	1,467,681
Goodwill	183,780	183,780
Other assets	685,385	1,080,872
Total assets	60,334,468	67,024,438
Current liabilities:
Accounts payable	7,293,498	8,058,624
Accrued expenses and other current liabilities	5,395,495	9,693,359
Non-cash litigation settlement due in shares of common stock	700,000	4,500,000
Warrant liability	0	693,457
Term loan, net - current	1,716,265	0
Total current liabilities	15,105,258	22,945,440
Long term loan, net:	21,870,212	0
Total liabilities	36,975,470	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; 68,371,643 shares issued and outstanding at June 30, 2016; 66,480,065 shares issued and outstanding at December 31, 2015	68,371	66,480
Additional paid-in capital	419,308,736	409,107,292
Accumulated deficit	(396,018,109)	(365,094,774)
Total stockholders' equity	23,358,998	44,078,998
Total liabilities and stockholders' equity	$ 60,334,468	$ 67,024,438