| Line Item | Jun 30, 2026 | Mar 31, 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 from loans | ||||||||||||||||
| Interest income from limited liability company investments | — | — | ||||||||||||||
| Interest expense and amortization of deferred financing costs | ||||||||||||||||
| Net interest income | — | — | ||||||||||||||
| Provision for credit losses related to loans held for investment | ||||||||||||||||
| Change in valuation allowance related to loans held for sale | ||||||||||||||||
| Net interest (loss) income after provision for credit losses related to loans held for investment and changes in valuation allowance related to loans held for sale | — | — | ||||||||||||||
| Fee income from loans | ||||||||||||||||
| Income from limited liability company investments | ||||||||||||||||
| Other investment income | ||||||||||||||||
| Gain (loss) on equity securities | ||||||||||||||||
| Other income | ||||||||||||||||
| Total other income | — | — | ||||||||||||||
| Operating expenses | ||||||||||||||||
| Compensation and employee benefits | ||||||||||||||||
| General and administrative expenses | ||||||||||||||||
| Transaction expenses | — | — | ||||||||||||||
| Impairment loss on real estate owned | — | |||||||||||||||
| Gain on sale of investments in developmental real estate, real estate owned, and property and equipment, net | ||||||||||||||||
| Other expenses | ||||||||||||||||
| Total operating expenses | ||||||||||||||||
| Net (loss) income | ||||||||||||||||
| Preferred stock dividends | ||||||||||||||||
| Net (loss) income attributable to common shareholders | ||||||||||||||||
| Basic and diluted net loss per common share outstanding: | ||||||||||||||||
| Basic (loss) income per common share (in dollars per share) | ||||||||||||||||
| Diluted (loss) income per common share (in dollars per share) |