0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Balance Sheets - Prosper Funding LLC link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Operations - Prosper Funding LLC link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Convertible Preferred Stock and Stockholders’ Deficit link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statements of Member’s Equity - Prosper Funding LLC link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - Consolidated Statements of Cash Flows - Prosper Funding LLC link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - ORGANIZATION AND BUSINESS link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - PROPERTY AND EQUIPMENT, NET link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - BORROWER LOANS AND NOTES, AT FAIR VALUE link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - CREDIT CARD link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - SERVICING ASSET link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - SECURITIZATIONS link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - GOODWILL link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - OTHER LIABILITIES link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - DEBT link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - NET INCOME (LOSS) PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - RELATED PARTIES link:presentationLink link:calculationLink link:definitionLink 9952178 - Disclosure - EMPLOYEE BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 9952179 - Disclosure - SIGNIFICANT CONCENTRATIONS link:presentationLink link:calculationLink link:definitionLink 9952180 - Disclosure - SEGMENTS link:presentationLink link:calculationLink link:definitionLink 9952181 - Disclosure - SUBSEQUENT EVENTS 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 - PROPERTY AND EQUIPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - BORROWER LOANS AND NOTES, AT FAIR VALUE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - OTHER LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - NET INCOME (LOSS) PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - RELATED PARTIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - SEGMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - ORGANIZATION AND BUSINESS (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Estimated Useful Lives of Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - PROPERTY AND EQUIPMENT, NET - Schedule of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - PROPERTY AND EQUIPMENT, NET - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - BORROWER LOANS AND NOTES, AT FAIR VALUE - Fair Value of Borrower Loans and Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - BORROWER LOANS AND NOTES, AT FAIR VALUE - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - CREDIT CARD (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - SERVICING ASSET (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - SECURITIZATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Fair Value Hierarchy (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Significant Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Summary of Changes in Level 3 Fair Value Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Summary of Changes in Level 3 Fair Value Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Level 3 Receivable from Credit Card Partner (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Schedule of Servicing Assets, Credit Card Derivative, and Convertible Preferred Stock Warrant Liability (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Loan Trailing Fee Liability (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Assumptions for Borrower Loans, Loans Held for Sale and Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Schedule Assumptions and the Sensitivity of the Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Receivable from Credit Card Partner (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Schedule Credit Card Derivative Asset (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - FAIR VALUE OF ASSETS AND LIABILITIES - Schedule of Assets and Liabilities Not Recorded at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - GOODWILL - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - OTHER LIABILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - DEBT (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - NET INCOME (LOSS) PER SHARE - Basic and Diluted Net Income (Loss) Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - NET INCOME (LOSS) PER SHARE - Computation of Diluted Net Income (Loss) Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Summary of Shares Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Valuation Techniques (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - STOCK-BASED COMPENSATION - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - STOCK-BASED COMPENSATION - Summarized Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - STOCK-BASED COMPENSATION - Additional Information Regarding Common Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - STOCK-BASED COMPENSATION - Fair Value of Stock Option Awards (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Restricted Stock Unit (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - STOCK-BASED COMPENSATION - Allocated Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - INCOME TAXES - Schedule of Domestic and Foreign Components of Net Income (Loss) Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - INCOME TAXES - Components of Income Tax (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - INCOME TAXES - Effective Income Tax Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - INCOME TAXES - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - INCOME TAXES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - INCOME TAXES - Schedule of Income Taxes Paid, Net of Refunds Received (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - INCOME TAXES - Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - LEASES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - LEASES - Operating Lease Right-of-Use Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - LEASES - Schedule of Lease Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - LEASES - Schedule of Lease Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - LEASES - Supplemental Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - LEASES - Other Information Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - RELATED PARTIES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - RELATED PARTIES - Aggregate Amount of Notes Purchased and the Income Earned (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - EMPLOYEE BENEFIT PLANS (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - SIGNIFICANT CONCENTRATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - SEGMENTS - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - SEGMENTS - Segment Information Reconciled (Details) link:presentationLink link:calculationLink link:definitionLink