Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 223,792	$ 85,864
Accounts receivable	9,284	9,129
Prepaid expenses and other current assets	4,845	3,702
Total current assets	237,921	98,695
Noncurrent assets:
Property and equipment, net	33,461	33,104
Intangible assets, net	6,245	2,027
Goodwill	11,583	9,039
Other noncurrent assets	604	650
TOTAL ASSETS	289,814	143,515
Current liabilities:
Accounts payable	5,806	4,827
Accrued expenses and other liabilities	11,723	10,470
Deferred revenue, current portion	5,845	4,859
Other current liabilities	2,261	581
Total current liabilities	25,635	20,737
Noncurrent liabilities
Deferred revenue, noncurrent portion	3,319	3,269
Deferred rent, noncurrent portion	1,638	1,387
Financing obligation on leases, noncurrent portion	15,197	15,450
Other noncurrent liabilities	490	1,016
Total liabilities	46,279	41,859
Stockholders' equity:
Additional paid-in capital	439,337	289,317
Accumulated other comprehensive loss	(157)	(300)
Accumulated deficit	(195,645)	(187,361)
Total stockholders' equity	243,535	101,656
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	289,814	143,515
Common Class A
Stockholders' equity:
Common stock	0	0
Common Class B
Stockholders' equity:
Common stock	$ 0	$ 0

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.