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COMMITMENTS AND CONTINGENCIES - Significant Off-balance Sheet Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	$ 149,458	$ 160,682
Commitments to originate loans: | Adjustable-rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	6,156	18,712
Commitments to originate loans: | Fixed-rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	6,522	17,085
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	1,999	2,045
Undisbursed loan funds and unused lines of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	$ 134,781	$ 122,840

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