Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 293,503	$ 91,551
Trade accounts receivable	0	12,577
Inventory	0	7,047
Prepaid expenses	5,994	7,404
Other current assets	5,206	1,335
Total current assets	304,703	119,914
Property and equipment, net	245	1,710
Indefinite-lived intangible asset	102,500	102,500
Goodwill	6,234	6,234
Other assets	3,931	1,147
Total assets	417,613	231,505
Current liabilities:
Accounts payable	3,356	4,549
Accrued expenses	10,499	6,374
Common stock warrant liabilities	512	809
Accrued compensation	6,616	3,652
Working capital advance note payable, net of discount of $3,733 at December 31, 2016	0	3,267
Deferred revenue	0	1,245
Current liabilities of discontinued operations	0	414
Total current liabilities	20,983	20,310
Long-term debt	0	18,824
Contingent consideration	76,900	52,800
Deferred tax liability	17,425	17,425
Other long-term liabilities	784	1,390
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value; 50,000 shares authorized; 34,808 and 24,813 shares issued and outstanding at December 31, 2017 and 2016, respectively.	35	25
Additional paid-in capital	873,526	565,954
Accumulated deficit	(572,040)	(445,223)
Total stockholders’ equity	301,521	120,756
Total liabilities and stockholders’ equity	$ 417,613	$ 231,505