Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 111,921	$ 111,332
Accounts receivable (less allowances of $1,277 and $1,286, respectively)	21,078	22,638
Prepaid expenses and other	4,858	5,352
Inventory	1,986	2,291
Total current assets	139,843	141,613
Property and equipment, net	14,806	15,386
Goodwill	133,031	133,031
Other intangible assets, net	13,853	14,964
Deferred income tax assets (less valuation allowance of $45,848 and $45,777, respectively)	81,659	83,983
Other assets	1,547	1,445
TOTAL ASSETS	384,739	390,422
Current liabilities:
Accounts payable and accrued liabilities	7,804	9,247
Accrued compensation and benefits	9,837	10,864
Deferred revenue	27,415	27,045
Total current liabilities	45,056	47,156
Deferred revenue	738	741
Other long-term liabilities	8,854	8,972
TOTAL LIABILITIES	$ 54,648	$ 56,869
Commitments and contingencies
Stockholders’ equity:
Preferred stock	$ 0	$ 0
Common stock	2	2
Additional paid-in capital	106,234	110,435
Retained earnings	223,855	223,116
TOTAL STOCKHOLDERS’ EQUITY	330,091	333,553
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 384,739	$ 390,422