Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 575,104	$ 643,095
Accounts receivable	35,679	53,416
Inventories	87,406	57,939
Other current assets	36,924	33,511
Assets Held-for-sale, Not Part of Disposal Group, Current	22,299
Total current assets	757,412	787,961
Intangible assets, net	36,624	56,384
Property and equipment, net	10,657	9,652
Restricted cash	2,556	2,552
Other assets	3,204	5,636
Total assets	810,453	862,185
Current liabilities:
Accounts payable	12,925	4,172
Accrued expenses	159,447	154,808
Deferred revenue, current	437	324
Other current liabilities	11,371	6,902
Total current liabilities	184,180	166,206
Convertible notes, net	149,793	143,446
Long-term debt, net	490,125	293,659
Deferred revenue, non-current	164	211
Other non-current liabilities	7,739	9,577
Total liabilities	832,001	613,099
Commitments and contingencies (Note 10)
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value; 10,000,000 shares authorized at both December 31, 2017 and June 30, 2018; no shares issued or outstanding at both December 31, 2017 and June 30, 2018
Common stock, $0.0001 par value; 100,000,000 shares authorized at both December 31, 2017 and June 30, 2018; 54,464,039 and 54,876,633 shares issued and outstanding at December 31, 2017 and June 30, 2018, respectively	5	5
Additional paid-in capital	1,785,696	1,724,850
Accumulated other comprehensive loss	(7,895)	(5,882)
Accumulated deficit	(1,799,354)	(1,469,887)
Total stockholders' equity (deficit)	(21,548)	249,086
Total liabilities and stockholders' equity (deficit)	$ 810,453	$ 862,185