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Disclosure - Summary of Operations and Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2202201 - Disclosure - Summary of Operations and Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 2403401 - Disclosure - Summary of Operations and Significant Accounting Policies - Allowance for Doubtful Accounts and Chargeback and Sales Refund Allowance (Details) link:presentationLink link:calculationLink link:definitionLink 2404402 - Disclosure - Summary of Operations and Significant Accounting Policies - Accounting Standards Update (Details) link:presentationLink link:calculationLink link:definitionLink 2105102 - Disclosure - Fair Value Measurements and Long-term Investments link:presentationLink link:calculationLink link:definitionLink 2406403 - Disclosure - Fair Value Measurements and Other Long-term Investments (Details) link:presentationLink link:calculationLink link:definitionLink 2107103 - Disclosure - Acquisition link:presentationLink link:calculationLink link:definitionLink 2308301 - Disclosure - Acquisition (Tables) link:presentationLink link:calculationLink link:definitionLink 2409404 - Disclosure - Acquisition - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2410405 - Disclosure - Acquisition - Schedule of Acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 2411406 - Disclosure - Acquisition - Pro Forma (Details) link:presentationLink link:calculationLink link:definitionLink 2112104 - Disclosure - Property and Equipment link:presentationLink link:calculationLink link:definitionLink 2313302 - Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 2414407 - Disclosure - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 2115105 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:calculationLink link:definitionLink 2316303 - 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Disclosure - Other (Loss) / Income, net (Details) link:presentationLink link:calculationLink link:definitionLink 2133110 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 2434416 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 2135111 - Disclosure - Net Income Per Share link:presentationLink link:calculationLink link:definitionLink 2336308 - Disclosure - Net Income Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 2437417 - Disclosure - Net Income Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 2138112 - Disclosure - Geographic Information link:presentationLink link:calculationLink link:definitionLink 2339309 - Disclosure - Geographic Information (Tables) link:presentationLink link:calculationLink link:definitionLink 2440418 - Disclosure - Geographic Information (Details) link:presentationLink link:calculationLink link:definitionLink 2141113 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 2442419 - Disclosure - Commitments and Contingencies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink