Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 107,151	$ 125,816
Accounts receivable, net	24,452	23,666
Prepaid expenses and other	7,669	4,384
Inventory	1,642	1,996
Total current assets	140,914	155,862
Non-current assets:
Property and equipment, net	13,889	12,818
Goodwill	133,031	133,031
Intangible assets, net	9,166	10,803
Deferred income tax assets	72,018	73,068
Other non-current assets	2,204	2,505
Total non-current assets	230,308	232,225
TOTAL ASSETS	371,222	388,087
Current liabilities:
Accounts payable	1,554	1,909
Accrued compensation and benefits	11,310	13,268
Accrued dividends payable	342	5,140
Accrued taxes	2,658	4,132
Deferred revenue	31,807	29,145
Other current liabilities	2,820	2,733
Total current liabilities	50,491	56,327
Non-current liabilities:
Deferred revenue	651	752
Other non-current liabilities	8,570	8,921
Total non-current liabilities	9,221	9,673
TOTAL LIABILITIES	59,712	66,000
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Common stock	2	2
Additional paid-in capital	96,943	104,810
Retained earnings	214,565	217,275
TOTAL STOCKHOLDERS’ EQUITY	311,510	322,087
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 371,222	$ 388,087