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Borrowings - Additional Information (Details) - USD ($) | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Line of Credit Facility [Line Items] |  |
Outstanding borrowings |  | $ 0
Remaining availability for FHLB borrowings | $ 32,000,000 | 40,500,000
FHLB of Topeka |  |
Line of Credit Facility [Line Items] |  |
Outstanding borrowings | 8,500,000 |
Investment Securities Pledged |  |
Line of Credit Facility [Line Items] |  |
FHLB borrowings, collateral for advances | 31,000 |
Loans Pledged |  |
Line of Credit Facility [Line Items] |  |
FHLB borrowings, collateral for advances | 54,000,000 |
Private Banker's Bank |  |
Line of Credit Facility [Line Items] |  |
Line of credit, maximum borrowing capacity | $ 5,000,000 | $ 5,000,000

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