Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 75,615,000	$ 41,026,000
Short-term marketable securities	222,421,000	248,140,000
Accounts receivable, net of allowance of $558 and $683 as of September 30, 2019 and December 31, 2018, respectively	61,314,000	75,825,000
Prepaid expenses and other current assets	20,459,000	13,974,000
Total current assets	379,809,000	378,965,000
Long-term marketable securities	100,951,000	76,710,000
Property and equipment, net	58,705,000	61,442,000
Operating Lease, Right-of-Use Asset	27,043,000
Deferred tax assets, net	18,302,000	26,387,000
Intangible assets, net	18,316,000	21,976,000
Goodwill	7,447,000	7,225,000
Restricted cash	1,200,000	1,200,000
Other noncurrent assets	14,151,000	11,775,000
Total assets	625,924,000	585,680,000
Current liabilities:
Accounts payable	909,000	5,588,000
Accrued liabilities	25,595,000	26,695,000
Deferred revenues, current	180,304,000	164,624,000
Finance Lease, Liability, Current	6,937,000	0
Operating Lease, Liability, Noncurrent	30,696,000
Total current liabilities	213,745,000	196,907,000
Deferred revenues, noncurrent	20,156,000	20,423,000
Other noncurrent liabilities	304,000	10,361,000
Total liabilities	264,901,000	227,691,000
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.001 par value; 20,000,000 shares authorized, no shares issued and outstanding at September 30, 2019 and December 31, 2018	0	0
Common stock, $0.001 par value; 1,000,000,000 shares authorized; 38,750,803 and 39,015,034 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	39,000	39,000
Additional paid-in capital	345,378,000	330,572,000
Accumulated other comprehensive income (loss)	2,271,000	(586,000)
Retained earnings	13,335,000	27,964,000
Total stockholders’ equity	361,023,000	357,989,000
Total liabilities and stockholders’ equity	$ 625,924,000	$ 585,680,000