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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) | 1 Months Ended | 3 Months Ended | 4 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
May 31, 2023 | Mar. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) | Apr. 30, 2023 | Dec. 31, 2024 USD ($) segment transmitter | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Aug. 31, 2021
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  | $ 153,563,000 | $ 52,708,000 | $ 11,497,000 |
Restricted cash |  |  | $ 4,100,000 |  | 4,100,000 | 4,390,000 | 4,390,000 |
Restricted cash, current |  |  | 3,600,000 |  | 3,600,000 | 3,600,000 |  |
Restricted cash, noncurrent |  |  | 600,000 |  | $ 600,000 | 800,000 |  |
Number of money transmitters | transmitter |  |  |  |  | 2 |  |  |
Escrow funds payable |  |  | 195,736,000 |  | $ 195,736,000 | 212,387,000 |  |
Gross trade receivables |  |  | 28,500,000 |  | 28,500,000 | 30,000,000.0 |  |
Gross client receivables |  |  | 51,600,000 |  | 51,600,000 | 78,200,000 |  |
Foreign currency transactions gain (loss) |  |  |  |  | $ 100,000 | 500,000 | (200,000) |
Number of reportable segments | segment |  |  |  |  | 1 |  |  |
Number of operating segments | segment |  |  |  |  | 1 |  |  |
Goodwill impairment |  |  | $ 0 |  | $ 0 | 0 | 0 |
Asset impairment charges |  |  |  |  | 0 | 0 | 0 |
Net cash paid for early extinguishment of convertible senior notes |  |  |  |  | 0 | 171,327,000 | 0 |
Revenue from contract with customer, service fee (as percent) | 10.00% |  |  |  |  |  |  |
Advertising expense |  |  |  |  | $ 57,100,000 | $ 83,200,000 | 121,200,000 |
Convertible Senior Notes |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |
Debt, interest rate (as percent) |  | 0.25% | 0.25% |  | 0.25% | 0.25% |  | 0.25%
Debt instrument, repurchased face amount |  | $ 214,000,000 |  |  |  |  |  |
Net cash paid for early extinguishment of convertible senior notes |  | $ 170,800,000 |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |
Property and equipment, useful lives (in years) |  |  | 2 years |  | 2 years |  |  |
Capitalized costs, amortization period (in years) |  |  | 2 years |  | 2 years |  |  |
Intangible asset useful life (in years) |  |  | 6 months |  | 6 months |  |  |
Revenue from contract with customer, service fee (as percent) |  |  |  | 5.00% |  | 5.00% |  |
Maximum |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |
Property and equipment, useful lives (in years) |  |  | 5 years |  | 5 years |  |  |
Capitalized costs, amortization period (in years) |  |  | 5 years |  | 5 years |  |  |
Intangible asset useful life (in years) |  |  | 3 years |  | 3 years |  |  |
Revenue from contract with customer, service fee (as percent) |  |  |  | 20.00% |  |  |  |
Foreign Currency Forward Contracts |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | $ 200,000 |  | $ 200,000 | $ 7,000,000.0 |  |
Accounts Receivable | Customer Concentration Risk | Two Clients |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  | 10.00% |  |  |
Revision of Prior Period, Reclassification, Adjustment |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  | $ 25,500,000 | $ 4,900,000 |

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Name: | srt_RestatementAxis=srt_RevisionOfPriorPeriodReclassificationAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |