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FAIR VALUE MEASUREMENTS - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities held to maturity | $ 169,312 | $ 175,392
Carrying Amount |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities available for sale | 118,447 | 119,436
Investment securities held to maturity | 192,759 | 203,079
Carrying Amount | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 32,809 | 29,414
Carrying Amount | Loans Receivable |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 1,054,764 | 1,047,086
Carrying Amount | FHLB stock |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 3,257 | 4,342
Carrying Amount | Certificates of deposit |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 254,512 | 227,459
Carrying Amount | FHLB advances |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 52,300 | 76,400
Carrying Amount | Junior subordinated debentures |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 27,135 | 27,091
Total Estimated Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities available for sale | 118,447 | 119,436
Investment securities held to maturity | 169,312 | 175,392
Total Estimated Fair Value | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 32,809 | 29,414
Total Estimated Fair Value | Loans Receivable |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 981,669 | 974,523
Total Estimated Fair Value | FHLB stock |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 3,257 | 4,342
Total Estimated Fair Value | Certificates of deposit |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 253,790 | 226,392
Total Estimated Fair Value | FHLB advances |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 52,242 | 76,316
Total Estimated Fair Value | Junior subordinated debentures |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 19,758 | 19,650
Level 1 | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 32,809 | 29,414
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities available for sale | 118,447 | 119,436
Investment securities held to maturity | 169,312 | 175,392
Level 2 | FHLB stock |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 3,257 | 4,342
Level 2 | Certificates of deposit |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 253,790 | 226,392
Level 2 | FHLB advances |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | 52,242 | 76,316
Level 3 | Loans Receivable |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets | 981,669 | 974,523
Level 3 | Junior subordinated debentures |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities | $ 19,758 | $ 19,650

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