Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 448,968	$ 208,342
Restricted cash	11,968	4,316
Prepaid expenses	5,933	8,613
Accrued revenue, net	13,254	13,334
Inventory	25,161	3,382
Loans held for sale	5,921	1,891
Other current assets	989	328
Total current assets	512,194	240,206
Property and equipment, net	23,361	22,318
Intangible assets, net	2,928	3,294
Goodwill	9,186	9,186
Other assets	7,248	6,951
Total assets	554,917	281,955
Current liabilities:
Accounts payable	2,601	1,901
Accrued liabilities	37,532	26,605
Other payables	12,167	4,068
Loan facility	5,790	2,016
Current portion of deferred rent	1,691	1,267
Total current liabilities	59,781	35,857
Deferred rent, net of current portion	10,258	10,668
Convertible senior notes, net	112,130	0
Total liabilities	182,169	46,525
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock—par value $0.001 per share; 500,000,000 shares authorized; 89,234,819 and 81,468,891 shares issued and outstanding, respectively	89	81
Preferred stock—par value $0.001 per share; 10,000,000 shares authorized and no shares issued and outstanding	0	0
Additional paid-in capital	531,418	364,352
Accumulated deficit	(158,759)	(129,003)
Total stockholders’ equity	372,748	235,430
Total liabilities and stockholders’ equity	$ 554,917	$ 281,955