Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements are prepared in accordance with the accounting principles generally accepted in the United States of America (“GAAP”) and include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K (the “Form 10-K”) for the year ended December 31, 2023, filed with the Securities and Exchange Commission (“SEC”) on February 29, 2024. The condensed consolidated balance sheet as of December 31, 2023, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis.
Use of Estimates	Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. Significant estimates and assumptions reflected in these condensed consolidated financial statements include, but are not limited to, revenue recognition, provision for transaction losses, impairment assessment of goodwill, capitalization of internal-use software and determination of useful lives, income taxes, and the valuation of stock-based compensation and leases. The Company evaluates its estimates and assumptions on an ongoing basis. Actual results could differ from those estimates and such differences may be material to the condensed consolidated financial statements.
Cash, Cash Equivalents, and Restricted Cash	The Company considers all short-term, highly liquid investments purchased with an original maturity of three months or less at the date of purchase to be cash equivalents. Certain cash equivalents consist of investments in debt securities that are classified as available-for-sale. As of June 30, 2024, the Company’s restricted cash relates to $3.6 million in Letters of Credit for its office leases in New York, New York. During the three and six months ended June 30, 2024, the Company purchased $8.9 million and $25.6 million of available-for-sale securities classified as cash equivalents, respectively. During the three and six months ended June 30, 2023, the Company purchased $19.9 million and $31.8 million of available-for-sale securities classified as cash equivalents, respectively. The carrying value of the restricted cash approximates fair value.
Recently Issued Accounting Pronouncements Not Yet Adopted	Recently Issued Accounting Pronouncements Not Yet Adopted In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which aims to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The standard will require all public entities, including those with a single reportable segment, to disclose significant segment expenses and other segment items on an annual and interim basis. The guidance requires a public entity to disclose the significant expense categories and amounts that are regularly provided to the chief operating decision-maker. This standard is effective for the Company’s annual report ending December 31, 2024, and for interim periods beginning January 1, 2025, with early adoption permitted. The Company is currently evaluating the potential impact of adopting this new guidance and while it only has one reportable segment, it does expect to enhance its current disclosures in the notes to the financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which modifies the rules on income tax disclosures. The standard will require entities to disclose (1) specific categories in the rate reconciliation, (2) the income or loss from continuing operations before income tax expense or benefit (separated between domestic and foreign) and (3) income tax expense or benefit from continuing operations (separated by federal, state and foreign). ASU 2023-09 also requires entities to disclose their income tax payments to international, federal, state and local jurisdictions, among other changes. The new standard is effective for the Company’s annual report ending December 31, 2025. The Company is currently evaluating the potential impact of adopting this new guidance on its consolidated financial statements and related disclosures.