| Line Item | Jun 30, 2026 | Dec 31, 2025 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Dec 31, 2024 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Dec 31, 2023 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Dec 31, 2022 | Sep 30, 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Interest income: | |||||||||||||||
| Loans held-for-investment | |||||||||||||||
| Cash and cash equivalents | |||||||||||||||
| Total interest income | |||||||||||||||
| Interest expense: | |||||||||||||||
| Repurchase facilities | |||||||||||||||
| Securitized debt obligations | |||||||||||||||
| Secured credit facility | |||||||||||||||
| Mortgage loan payable | — | — | |||||||||||||
| Loan participations sold | — | — | |||||||||||||
| Total interest expense | |||||||||||||||
| Net interest income | |||||||||||||||
| Other income (loss): | |||||||||||||||
| Revenue from real estate owned operations | |||||||||||||||
| Provision for credit losses | |||||||||||||||
| Gain (loss) on sale of real estate owned | |||||||||||||||
| Realized loss on loan sales | — | — | |||||||||||||
| Total other income (loss) | |||||||||||||||
| Expenses: | |||||||||||||||
| Compensation and benefits | |||||||||||||||
| Servicing expenses | |||||||||||||||
| Expenses from real estate owned operations | |||||||||||||||
| Other operating expenses | |||||||||||||||
| Total expenses | |||||||||||||||
| Income (loss) before income taxes | |||||||||||||||
| Provision for (benefit from) income taxes | |||||||||||||||
| Net income (loss) | |||||||||||||||
| Dividends on preferred stock | |||||||||||||||
| Net (loss) income attributable to common stockholders - basic | |||||||||||||||
| Net (loss) income attributable to common stockholders - diluted | |||||||||||||||
| Basic (loss) earnings per weighted average common share (in usd per share) | — | ||||||||||||||
| Diluted (loss) earnings per weighted average common share (in usd per share) |