Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 26,685	$ 19,485
Accounts receivable, net	26,148	42,978
Prepaid expenses and other current assets	6,369	5,344
Total current assets	59,202	67,807
Property and equipment, net	262,359	250,765
Goodwill	42,403	42,403
Intangible assets, net	10,263	13,783
Other assets	10,082	6,223
Total assets	384,309	380,981
Current liabilities:
Accounts payable	11,589	15,516
Accrued expenses and other liabilities	42,405	27,723
Deferred revenue	61,708	50,869
Current portion of long-term debt	875	1,094
Current portion of capital leases and notes payable	5,771	3,993
Total current liabilities	122,348	99,195
Deferred revenue, net of current portion	149,168	152,719
Long-term debt	0	15,875
Long-term portion of capital leases and notes payable	6,747	4,612
Deferred tax liabilities	1,004	3,208
Other liabilities	6,012	6,826
Total liabilities	285,279	282,435
Commitments and contingencies (Note 12)
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; 40,995 and 38,562 shares issued and outstanding for 2017 and 2016, respectively	4	4
Additional paid-in capital	230,679	211,275
Accumulated deficit	(131,967)	(112,601)
Accumulated other comprehensive loss	(898)	(870)
Total common stockholders' equity	97,818	97,808
Non-controlling interests	1,212	738
Total stockholders' equity	99,030	98,546
Total liabilities and stockholders' equity	$ 384,309	$ 380,981

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.