Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 151,947	$ 40,401
Marketable securities	20,100	40,214
Accounts receivable, net	22,236	33,350
Prepaid expenses and other current assets	8,363	8,235
Total current assets	202,646	122,200
Property and equipment, net	392,940	380,243
Operating lease right-of-use assets, net	13,989	15,196
Goodwill	58,579	58,579
Intangible assets, net	12,724	14,940
Other assets	11,130	9,309
Total assets	692,008	600,467
Current liabilities:
Accounts payable	27,434	24,298
Accrued expenses and other liabilities	56,356	65,152
Deferred revenue	66,141	61,229
Current portion of operating leases	2,597	2,695
Current portion of long-term debt	60,778	778
Current portion of finance leases	1,790	2,721
Current portion of notes payable	707	1,527
Total current liabilities	215,803	158,400
Deferred revenue, net of current portion	167,287	166,660
Long-term portion of operating leases	15,933	17,357
Long-term debt	207,115	162,708
Long-term portion of finance leases	0	572
Long-term portion of notes payable	0	95
Deferred tax liabilities	1,005	993
Other liabilities	184	201
Total liabilities	607,327	506,986
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock, $0.0001 par value; 5,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.0001 par value; 100,000 shares authorized; 44,465 and 44,224 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	4	4
Additional paid-in capital	237,985	234,638
Accumulated deficit	(151,446)	(140,973)
Accumulated other comprehensive loss	(2,448)	(1,426)
Total common stockholders' equity	84,095	92,243
Non-controlling interests	586	1,238
Total stockholders' equity	84,681	93,481
Total liabilities and stockholders' equity	$ 692,008	$ 600,467