LOANS AND ALLOWANCE FOR CREDIT LOSSES FOR LOANS - Reconciliation of the allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024
Reconciliation of the allowance for loan losses
Beginning balance	$ 15,466	$ 15,346	$ 15,364	$ 15,309	$ 15,309
(Recapture of) provision for credit losses			100
Charge-offs	(116)	(2)	(117)	(13)	(13)
Recoveries	2	17	5	23
Ending balance	15,352	15,361	15,352	15,361	15,364
Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				42	42
Commercial Real Estate Portfolio Segment \| Commercial Business
Reconciliation of the allowance for loan losses
Beginning balance	5,118	5,339	5,280	3,123	3,123
(Recapture of) provision for credit losses	16	(74)	(146)	258
Ending balance	5,134	5,265	5,134	5,265	5,280
Commercial Real Estate Portfolio Segment \| Commercial Business \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				1,884	1,884
Commercial Real Estate Portfolio Segment \| Commercial Real Estate
Reconciliation of the allowance for loan losses
Beginning balance	7,137	7,138	7,391	8,894	8,894
(Recapture of) provision for credit losses	162	141	(92)	(121)
Charge-offs	(80)		(80)
Ending balance	7,219	7,279	7,219	7,279	7,391
Commercial Real Estate Portfolio Segment \| Commercial Real Estate \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				(1,494)	(1,494)
Commercial Real Estate Portfolio Segment \| Land
Reconciliation of the allowance for loan losses
Beginning balance	139	112	106	93	93
(Recapture of) provision for credit losses	(67)	45	(34)	24
Ending balance	72	157	72	157	106
Commercial Real Estate Portfolio Segment \| Land \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				40	40
Commercial Real Estate Portfolio Segment \| Multi-Family
Reconciliation of the allowance for loan losses
Beginning balance	354	293	367	798	798
(Recapture of) provision for credit losses	11	41	(2)	28
Ending balance	365	334	365	334	367
Commercial Real Estate Portfolio Segment \| Multi-Family \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				(492)	(492)
Commercial Real Estate Portfolio Segment \| Real Estate Construction
Reconciliation of the allowance for loan losses
Beginning balance	925	860	636	764	764
(Recapture of) provision for credit losses	(96)	(129)	193	(164)
Ending balance	829	731	829	731	636
Commercial Real Estate Portfolio Segment \| Real Estate Construction \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				131	131
Consumer
Reconciliation of the allowance for loan losses
Beginning balance	1,793	1,604	1,584	1,127	1,127
(Recapture of) provision for credit losses	(26)	(24)	181	(25)
Charge-offs	(36)	(2)	(37)	(13)
Recoveries	2	17	5	23
Ending balance	$ 1,733	$ 1,595	$ 1,733	1,595	1,584
Consumer \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				483	483
Unallocated
Reconciliation of the allowance for loan losses
Beginning balance				510	510
Unallocated \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance				$ (510)	$ (510)

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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