Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 208,342	$ 64,030
Restricted cash	4,316	3,815
Short-term investments	0	1,749
Prepaid expenses	8,613	4,388
Accrued revenue, net	13,334	10,625
Other current assets	3,710	8,781
Loans held for sale	1,891	0
Total current assets	240,206	93,388
Property and equipment, net	22,318	19,226
Intangible assets, net	3,294	3,782
Goodwill	9,186	9,186
Deferred offering costs	0	720
Other assets	6,951	7,175
Total assets:	281,955	133,477
Current liabilities:
Accounts payable	1,901	5,385
Accrued liabilities	26,605	22,253
Other payables	4,068	3,793
Loan facility	2,016	0
Current portion of deferred rent	1,267	1,512
Total current liabilities	35,857	32,943
Deferred rent, net of current portion	10,668	8,852
Total liabilities	46,525	41,795
Commitments and contingencies (Note 10)
Redeemable convertible preferred stock—par value $0.001 per share; As of December 31, 2016: 166,266,114 shares authorized; 55,422,002 issued and outstanding; and aggregate liquidation preference of $167,488. As of December 31, 2017: no shares authorized, issued, and outstanding.	0	655,416
Stockholders’ equity/(deficit):
Common stock—par value $0.001 per share; 290,081,638 and 500,000,000 shares authorized, respectively; 14,687,024 and 81,468,891 shares issued and outstanding, respectively	81	15
Preferred stock—par value $0.001 per share; As of December 31, 2016: no shares authorized, issued and outstanding. As of December 31, 2017: 10,000,000 shares authorized and no shares issued and outstanding.	0	0
Additional paid-in capital	364,352	0
Accumulated deficit	(129,003)	(563,749)
Total stockholders’ equity/(deficit)	235,430	(563,734)
Total liabilities, redeemable convertible preferred stock and stockholders’ equity/(deficit):	$ 281,955	$ 133,477