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Business and Organization (Details) $ / shares in Units, $ in Millions |  | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
May 20, 2024 USD ($) $ / shares | Sep. 30, 2024 USD ($) payment $ / shares shares | Jun. 11, 2024 shares | May 14, 2024 $ / shares shares | Dec. 31, 2023 shares | Dec. 31, 2020 $ / shares
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |
Number of payments made on RPL mortgage loans (at least) | payment |  | 5 |  |  |  |
Number of payments not made on NPL mortgage loans | payment |  | 3 |  |  |  |
Fair value of warrants (in dollar per share) | $ / shares |  |  |  |  |  | $ 10.0
Issued of common stock (in shares) | shares |  | 44,978,969 |  |  | 27,460,161 |
Great Ajax II REIT |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |
Ownership percentage by parent (as percent) |  | 99.90% |  |  | 99.90% |
Former Management Agreement | Common stock |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |
Issued of common stock (in shares) | shares |  |  | 3,200,000 |  |  |
Rithm |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |
Fair value of warrants (in shares) | shares |  |  |  | 6,500,000 |  |
Fair value of warrants (in dollar per share) | $ / shares |  | $ 5.36 |  | $ 5.36 |  |
Rithm | Secured Debt | Line of Credit |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ | $ 14.0 | $ 14.0 |  |  |  |
Stock price of common stock (in dollars per share) | $ / shares | $ 4.87 | $ 4.87 |  |  |  |
Sale of stock, average trailing closing price, period (in days) | 5 days |  |  |  |  |
Residential RPLs |  |  |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |  |  |
Number of recent payments made on RPL mortgage loans | payment |  | 7 |  |  |  |

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