001000 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 001010 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 002000 - Statement - CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 003000 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 004000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 006010 - Disclosure - Description of Business link:presentationLink link:calculationLink link:definitionLink 006020 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 006030 - Disclosure - Intangible Assets link:presentationLink link:calculationLink link:definitionLink 006040 - Disclosure - Cash, Cash Equivalents and Investments link:presentationLink link:calculationLink link:definitionLink 006050 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 006060 - Disclosure - Accounts Payable and Accrued Expenses link:presentationLink link:calculationLink link:definitionLink 006070 - Disclosure - Allowance for Doubtful Accounts link:presentationLink link:calculationLink link:definitionLink 006080 - Disclosure - Property and Equipment link:presentationLink link:calculationLink link:definitionLink 006090 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 006100 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 006110 - Disclosure - Employee Stock Plans link:presentationLink link:calculationLink link:definitionLink 006120 - Disclosure - Legal Proceedings link:presentationLink link:calculationLink link:definitionLink 006130 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 006140 - Disclosure - Quarterly Information (Unaudited) link:presentationLink link:calculationLink link:definitionLink 000990 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink