CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 123,040	$ 106,092
Accounts receivable, net	19,427	17,375
Prepaid expenses and other current assets	4,386	5,327
Total current assets	146,853	128,794
Long-term restricted investments	1,181	1,181
Property and equipment, net	13,803	11,829
Intangible assets, net	3,293	4,019
Goodwill	51,438	51,438
Deferred tax assets, net	5,137	6,124
Investments	1,625	1,442
Other assets	907	223
Total assets	224,237	205,050
Current liabilities:
Accrued compensation and employee benefits	6,912	6,611
Accounts payable and accrued expenses	8,044	5,273
Deferred revenue	15,087	13,891
Total current liabilities	30,043	25,775
Deferred rent	2,785	3,365
Other liabilities	802	1,776
Total liabilities	33,630	30,916
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized and zero shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	0	0
Common stock, $0.01 par value; 100,000,000 shares authorized and 25,936,625 and 25,696,796 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	260	258
Additional paid-in capital	185,271	180,695
Retained earnings/(accumulated deficit)	5,076	(6,819)
Total stockholders’ equity	190,607	174,134
Total liabilities and stockholders’ equity	$ 224,237	$ 205,050