v3.26.1
ORGANIZATION AND BUSINESS (Details) - state
 1 Months Ended 12 Months Ended
Nov. 30, 2021
Dec. 31, 2021
Dec. 31, 2025
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]      
Percentage of notes allowed for investors to purchase     100.00%
Number of states and district marketplace is open to investors     31
Additional number of states and district marketplace is open to borrowers     47
New customer account split percentage 95.00%    
Prosper and coastal interest income percentage receivable   100.00%  
Prosper Funding LLC      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]      
Percentage of notes allowed for investors to purchase     100.00%
Number of states and district marketplace is open to investors     31
Additional number of states and district marketplace is open to borrowers     47
Coastal Allocations      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]      
New customer account split percentage   5.00%  
Prosper and coastal interest income percentage receivable   100.00%