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Summary of Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Property and Equipment, Net - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Borrower Loans and Notes, at Fair Value - Schedule of Fair Value of Borrower Loans and Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Borrower Loans and Notes, at Fair Value - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Credit Card (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Servicing Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Securitizations (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Fair Value of Assets and Liabilities - Schedule of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Fair Value of Assets and Liabilities - Schedule of Quantitative Information About Significant Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair Value of Assets and Liabilities - Schedule of Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Fair Value of Assets and Liabilities - Schedule of Level 3 Receivable from Credit Card Partner (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Fair Value of Assets and Liabilities - 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Disclosure - Convertible Preferred Stock, Convertible Preferred Stock Warrant Liability and Common Stock - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Convertible Preferred Stock, Convertible Preferred Stock Warrant Liability and Common Stock - Schedule of Shares Authorized, Issued, Outstanding, Par Value and Liquidation Preference of Convertible Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Convertible Preferred Stock, Convertible Preferred Stock Warrant Liability and Common Stock - Schedule of Assumptions Used (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Stock-Based Compensation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Stock-Based Compensation - Schedule of Summarized Option Activity Under Option Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - 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