Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 12,948	$ 26,685
Restricted cash	512	0
Accounts receivable, net	37,444	26,148
Prepaid expenses and other current assets	7,200	6,369
Total current assets	58,104	59,202
Property and equipment, net	278,284	262,359
Goodwill	42,403	42,403
Intangible assets, net	8,833	10,263
Other assets	7,771	10,082
Total assets	395,395	384,309
Current liabilities:
Accounts payable	19,757	11,589
Accrued expenses and other liabilities	42,205	42,405
Deferred revenue	67,446	61,708
Current portion of long-term debt	438	875
Current portion of capital leases and notes payable	6,852	5,771
Total current liabilities	136,698	122,348
Deferred revenue, net of current portion	135,450	149,168
Long-term portion of capital leases and notes payable	7,936	6,747
Deferred tax liabilities	1,007	1,004
Other liabilities	5,763	6,012
Total liabilities	286,854	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; 42,253 and 40,995 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	4	4
Additional paid-in capital	238,012	230,679
Accumulated deficit	(129,824)	(131,967)
Accumulated other comprehensive loss	(1,223)	(898)
Total common stockholders' equity	106,969	97,818
Non-controlling interests	1,572	1,212
Total stockholders' equity	108,541	99,030
Total liabilities and stockholders' equity	$ 395,395	$ 384,309