| 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 | ||||||||||||||||
| Interest and fees on loans | ||||||||||||||||
| Interest on securities | ||||||||||||||||
| Other interest income | ||||||||||||||||
| Total interest income | ||||||||||||||||
| Interest expense | ||||||||||||||||
| Interest on deposits | ||||||||||||||||
| Total interest expense | ||||||||||||||||
| Net interest income | ||||||||||||||||
| Provision for credit losses | ||||||||||||||||
| Net interest income after provision for credit losses | ||||||||||||||||
| Non-interest income | ||||||||||||||||
| Strategic Program fees | ||||||||||||||||
| Gain on sale of loans, net | ||||||||||||||||
| SBA loan servicing fees, net | ||||||||||||||||
| Change in fair value on investment in BFG | ||||||||||||||||
| Interchange income | — | — | ||||||||||||||
| Credit enhancement income | ||||||||||||||||
| Other miscellaneous income | ||||||||||||||||
| Total non-interest income | ||||||||||||||||
| Non-interest expense | ||||||||||||||||
| Salaries and employee benefits | ||||||||||||||||
| Professional services | ||||||||||||||||
| Occupancy and equipment expenses | ||||||||||||||||
| Credit enhancement servicing expense | ||||||||||||||||
| Credit enhancement guarantee expense | ||||||||||||||||
| Other operating expenses | ||||||||||||||||
| Total non-interest expense | ||||||||||||||||
| Income before income taxes | ||||||||||||||||
| Provision for income taxes | ||||||||||||||||
| Net income (loss) | ||||||||||||||||
| Earnings per share, basic (in dollars per share) | ||||||||||||||||
| Earnings per share, diluted (in dollars per share) | — |