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Loans Held for Investment and Allowance for Credit Losses - Outstanding Loan Balances Categorized by Credit Quality Indicators (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 337,635 | $ 236,601
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 211,319
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 573
Classified/Doubtful/Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 450
SBA |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 145,172
SBA | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 144,149
SBA | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 573
SBA | Classified/Doubtful/Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 450
Commercial, non-real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 11,484
Commercial, non-real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 11,484
Commercial, non-real estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 0
Commercial, non-real estate | Classified/Doubtful/Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 0
Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 49,046 | 37,815
Residential real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 33,183 | 37,815
Residential real estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 655 | 0
Residential real estate | Classified/Doubtful/Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 0
Commercial real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 183,579 | 12,063
Commercial real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 101,408 | 12,063
Commercial real estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 3,835 | 0
Commercial real estate | Classified/Doubtful/Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 0
Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 6,870 | 5,808
Consumer | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 6,858 | 5,808
Consumer | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 | 0
Consumer | Classified/Doubtful/Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans |  | 0
Retained Strategic Program loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 20,040 | $ 24,259
Retained Strategic Program loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 0 |
Retained Strategic Program loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 0 |

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