0000001 - Document - Cover page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed consolidated balance sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed consolidated balance sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed consolidated statements of operations link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed consolidated statements of comprehensive income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed consolidated statements of stockholders' equity link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed consolidated statements of cash flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Nature of operations link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Summary of significant accounting policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Acquisition link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Goodwill and other intangible assets link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Accrued expenses and other current liabilities link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Commitments and contingencies link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Income taxes link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Stock-based compensation link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Repurchase of common stock link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Net income per share link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Segment information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Summary of significant accounting policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Summary of significant accounting policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Acquisition (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Goodwill and other intangible assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Accrued expenses and other current liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Stock-based compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Net income per share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Segment information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Summary of significant accounting policies - Schedule of Useful Lives by Major Asset Class (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Summary of significant accounting policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Summary of significant accounting policies - Schedule of Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Acquisition - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Acquisition - Schedule of Consideration Transferred (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Acquisition - Schedule of Purchase Price Allocation (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Acquisition - Schedule of Intangible Assets and Liabilities Acquired (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Goodwill and other intangible assets - Schedule of Information Regarding Company's Goodwill and Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Goodwill and other intangible assets - Schedule of Information Regarding Company's Goodwill and Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Goodwill and other intangible assets- Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Goodwill and other intangible assets - Schedule of Future Amortization Expense for Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Accrued expenses and other current liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Debt - Schedule of Outstanding Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Debt - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Debt - Schedule of Maturities of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Commitments and contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Stock-based compensation - Schedule of Share-Based Payment Arrangement, Expensed and Capitalized, Amount (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Stock-based compensation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Repurchase of common stock (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Net income per share (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Leases - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Leases - Schedule of Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Leases - Schedule of Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Leases - Schedule of Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Leases - Schedule of Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Leases - Schedule of Weighted Average Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Segment information (Details) link:presentationLink link:calculationLink link:definitionLink