Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 91,906	$ 305,665
Short-term marketable securities	192,031	0
Accounts receivable, net	37,258	26,203
Prepaid expenses and other current assets	26,420	21,512
Total current assets	347,615	353,380
Restricted cash	7,450	7,445
Property and equipment, net	47,718	37,552
Intangible assets, net	21,274	10,268
Goodwill	17,407	3,565
Other long-term assets	2,084	484
Total assets	443,548	412,694
Current liabilities:
Accounts payable	7,117	4,174
Accrued expenses and other current liabilities	55,283	59,308
Deferred revenue	13,599	10,222
Total current liabilities	75,999	73,704
Long-term liabilities	12,549	9,543
Total liabilities	88,548	83,247
Commitments and contingencies (Note 10)
Stockholders' equity:
Class A and Class B common stock	93	87
Additional paid-in capital	584,390	516,090
Accumulated deficit	(231,519)	(186,730)
Accumulated other comprehensive income	2,036
Total stockholders' equity	355,000	329,447
Total liabilities and stockholders' equity	$ 443,548	$ 412,694