Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 8,849	$ 27,338
Restricted cash	0	545
Marketable securities	1,614	32,962
Accounts receivable, net	27,917	16,326
Prepaid expenses and other current assets	3,916	2,566
Deferred tax assets	787	1,192
Total current assets	43,083	80,929
Property and equipment, net	111,772	67,560
Goodwill	42,403	42,403
Intangible assets, net	19,676	23,413
Other assets	2,468	1,210
Total assets	219,402	215,515
Current liabilities:
Accounts payable	4,004	11,642
Accrued expenses and other liabilities	26,109	16,529
Deferred revenue	25,488	19,292
Current portion of long-term debt	875
Current portion of capital leases	309	526
Total current liabilities	56,785	47,989
Deferred revenue, net of current portion	27,267	21,591
Long-term debt	2,625
Long-term portion of capital leases	381	473
Deferred tax liabilities	3,432	3,369
Other liabilities	1,482	1,660
Total liabilities	91,972	75,082
Commitments and contingencies (Note 13)
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; 36,267 and 35,226 shares issued and outstanding for 2014 and 2013, respectively	4	4
Additional paid-in capital	189,725	182,927
Accumulated deficit	(62,884)	(43,363)
Accumulated other comprehensive loss	(443)
Total common stockholders' equity	126,402	139,568
Non-controlling interests	1,028	865
Total stockholders' equity	127,430	140,433
Total liabilities and stockholders' equity	$ 219,402	$ 215,515