Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 446,938	$ 258,567
Restricted cash	47	47
Marketable securities	21,144	73,880
Accounts receivable, net	11,682	0
Inventory	3,074	0
Prepaid expenses and other current assets	7,808	2,315
Total current assets	490,693	334,809
Property and equipment, net	7,306	4,922
Intangible assets	8,380	0
Other assets	558	551
Total assets	506,937	340,282
Current liabilities:
Accounts payable	3,714	6,128
Accrued expenses and other current liabilities	34,411	26,597
Total current liabilities	38,125	32,725
Other non-current liabilities	213	379
Note payable	162,759	0
Total liabilities	201,097	33,104
Commitments and contingencies
Stockholders’ equity:
Common stock, $.0001 par value; 200,000,000 shares authorized, 44,531,913 shares and 43,141,134 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively	4	4
Additional paid-in-capital	1,117,101	935,671
Accumulated other comprehensive income	2	71
Accumulated deficit	(811,267)	(628,568)
Total stockholders’ equity	305,840	307,178
Total liabilities and stockholders’ equity	$ 506,937	$ 340,282