Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 145,916	$ 40,401
Marketable securities	29,301	40,214
Accounts receivable, net	37,910	33,350
Prepaid expenses and other current assets	8,519	8,235
Total current assets	221,646	122,200
Property and equipment, net	384,636	380,243
Operating lease right-of-use assets, net	14,557	15,196
Goodwill	58,579	58,579
Intangible assets, net	13,829	14,940
Other assets	9,843	9,309
Total assets	703,090	600,467
Current liabilities:
Accounts payable	31,608	24,298
Accrued expenses and other liabilities	54,940	65,152
Deferred revenue	66,133	61,229
Current portion of operating leases	2,586	2,695
Current portion of long-term debt	972	778
Current portion of finance leases	2,344	2,721
Current portion of notes payable	1,131	1,527
Total current liabilities	159,714	158,400
Deferred revenue, net of current portion	171,557	166,660
Long-term portion of operating leases	16,633	17,357
Long-term debt	264,890	162,708
Long-term portion of finance leases	131	572
Long-term portion of notes payable	25	95
Deferred tax liabilities	1,005	993
Other liabilities	182	201
Total liabilities	614,137	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; 44,314 and 44,224 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	4	4
Additional paid-in capital	236,048	234,638
Accumulated deficit	(145,606)	(140,973)
Accumulated other comprehensive loss	(2,445)	(1,426)
Total common stockholders' equity	88,001	92,243
Non-controlling interests	952	1,238
Total stockholders' equity	88,953	93,481
Total liabilities and stockholders' equity	$ 703,090	$ 600,467