Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 50,183,397	$ 16,455,995
Prepaid research and development	311,500	1,990,759
Other current assets	118,437	29,128
Total current assets	50,613,334	18,475,882
Equipment, net	3,829	1,164
In-process research and development	2,797,600	2,797,600
Goodwill	799,391	799,391
Other assets	85,121	0
Total assets	54,299,275	22,074,037
Liabilities and equity
Notes payable, current portion	677,778	677,778
Accounts payable and accrued expenses	4,325,313	1,117,397
Accrued compensation	350,000	145,000
Current portion of deferred revenue	152,381	152,381
Interest payable	172,751	123,511
Total current liabilities	5,678,223	2,216,067
Deferred revenue, net of current portion	1,714,286	1,828,571
Notes payable, less current portion, at fair value	2,269,046	2,479,098
Total liabilities	9,661,555	6,523,736
Commitments and contingencies
Equity:
Preferred stock, $0.001 par value per share (10,000,000 shares authorized, no shares issued and outstanding as of September 30, 2013 and December 31, 2012)	0	0
Common stock, $0.001 par value per share (500,000,000 shares authorized, 33,414,135and 25,820,738 shares issued, 33,400,609 and 25,807,212 shares outstanding at September 30,2013 and December 31, 2012, respectively)	33,414	25,821
Contingently issuable shares	6	6
Additional paid-in capital	78,428,989	34,534,805
Treasury stock, at cost, 13,526 shares at September 30, 2013 and December 31, 2012	(84,538)	(84,538)
Deficit accumulated in development stage	(33,740,151)	(18,925,793)
Total equity	44,637,720	15,550,301
Total liabilities and equity	$ 54,299,275	$ 22,074,037