Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 18,552	$ 26,685
Restricted cash	512	0
Accounts receivable, net	28,861	26,148
Prepaid expenses and other current assets	6,482	6,369
Total current assets	54,407	59,202
Property and equipment, net	264,629	262,359
Goodwill	42,403	42,403
Intangible assets, net	9,531	10,263
Other assets	7,577	10,082
Total assets	378,547	384,309
Current liabilities:
Accounts payable	16,743	11,589
Accrued expenses and other liabilities	38,907	42,405
Deferred revenue	76,340	61,708
Current portion of long-term debt	656	875
Current portion of capital leases and notes payable	6,068	5,771
Total current liabilities	138,714	122,348
Deferred revenue, net of current portion	125,174	149,168
Long-term portion of capital leases and notes payable	6,961	6,747
Deferred tax liabilities	1,028	1,004
Other liabilities	5,891	6,012
Total liabilities	277,768	285,279
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $0.0001 par value; 5,000 shares authorized; no shares issued and outstanding
Common stock, $0.0001 par value; 100,000 shares authorized; 41,753 and 40,995 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	4	4
Additional paid-in capital	231,879	230,679
Accumulated deficit	(131,939)	(131,967)
Accumulated other comprehensive loss	(899)	(898)
Total common stockholders' equity	99,045	97,818
Non-controlling interests	1,734	1,212
Total stockholders' equity	100,779	99,030
Total liabilities and stockholders' equity	$ 378,547	$ 384,309

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).

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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.