Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 41,026	$ 86,591
Marketable Securities, Current	248,140	201,823
Accounts receivable, net of allowance of $702 and $769 at December 31, 2016 and 2015, respectively	75,825	64,412
Prepaid expenses and other current assets	13,974	16,524
Total current assets	378,965	369,350
Marketable Securities, Noncurrent	76,710	67,224
Long-term investments	2,500	0
Property and equipment, net	61,442	58,557
Deferred tax assets, net	26,387	25,066
Intangible assets, net	21,976	12,401
Goodwill	7,225	1,549
Restricted cash	1,200	1,200
Other noncurrent assets	9,275	2,178
Total assets	585,680	537,525
Current liabilities:
Accounts payable	5,588	1,144
Accrued liabilities	25,130	21,444
Deferred revenues, current	164,624	143,186
Capital Lease Obligations, Current	1,565	0
Total current liabilities	196,907	165,774
Deferred revenues, noncurrent	20,423	17,136
Other noncurrent liabilities	10,361	11,071
Total liabilities	227,691	193,981
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock: $0.001 par value; 20,000,000 shares authorized, no shares issued and outstanding at December 31, 2016 and 2015	0	0
Common stock, $0.001 par value; 1,000,000,000 shares authorized, 35,841,001 and 34,414,631 shares issued and outstanding at December 31, 2016 and 2015, respectively	39	39
Additional paid-in capital	330,572	304,155
Accumulated other comprehensive loss	(586)	(574)
Accumulated deficit	27,964	39,924
Total stockholders’ equity	357,989	343,544
Total liabilities and stockholders’ equity	$ 585,680	$ 537,525