Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 272,103	$ 293,503
Prepaid expenses	9,089	5,994
Other current assets	3,933	5,206
Total current assets	285,125	304,703
Property and equipment, net	279	245
Intangible assets	102,500	102,500
Goodwill	6,234	6,234
Other assets	1,040	3,931
Total assets	395,178	417,613
Current liabilities:
Accounts payable	4,434	3,356
Accrued clinical trial expenses	12,160	8,657
Accrued compensation	3,267	6,616
Other accrued liabilities	2,501	1,842
Contingent consideration, current portion	18,500	0
Common stock warrant liabilities	543	512
Total current liabilities	41,405	20,983
Contingent consideration	55,900	76,900
Deferred income taxes	17,425	17,425
Other long-term liabilities	582	784
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.001 par value; 50,000 shares authorized; 35,827 and 34,808 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	36	35
Additional paid-in capital	911,087	873,526
Accumulated deficit	(631,257)	(572,040)
Total stockholders’ equity	279,866	301,521
Total liabilities and stockholders’ equity	$ 395,178	$ 417,613