CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 15,302,382	$ 13,073,137
Short-term investments	5,106,627	40,624,349
Prepaid expenses and other current assets	1,561,705	1,784,069
Total current assets	21,970,714	55,481,555
Property and equipment, net	417,815	528,476
Intangible assets	41,575,516	41,575,516
Goodwill		16,902,466
Other assets	57,345	2,127,551
Total assets	64,021,390	116,615,564
Current liabilities:
Accounts payable	412,456	1,138,470
Accrued expenses	3,182,415	3,727,784
Derivative liabilities	64,877	256,027
Total current liabilities	3,659,748	5,122,281
Convertible notes payable, net of discount	28,278,875	27,303,860
Derivative liabilities	55,000	2,400,000
Deferred taxes	16,879,659	16,879,659
Contingent consideration and other liabilities	21,088,834	31,507,588
Total liabilities	$ 69,962,116	$ 83,213,388
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value; 25,000,000 shares authorized, none issued and outstanding
Common stock, $0.0001 par value; 100,000,000 shares authorized, 22,334,901 and 24,769,083 shares issued and outstanding at December 31, 2014 and December 31, 2015, respectively	$ 2,477	$ 2,234
Additional paid-in capital	169,683,829	159,308,307
Cumulative translation adjustment	(70,790)	(69,031)
Cumulative unrealized loss on investments	(971)	(8,117)
Accumulated deficit	(175,555,271)	(125,831,217)
Total stockholders’ equity (deficit)	(5,940,726)	33,402,176
Total liabilities and stockholders’ equity (deficit)	$ 64,021,390	$ 116,615,564