LOANS AND ALLOWANCE FOR CREDIT LOSSES - Reconciliation of the allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024
Reconciliation of the allowance for loan losses
Beginning balance	$ 15,364	$ 15,309	$ 15,309
Charge-offs	(1)	(11)	(13)
Recoveries	1	3
Ending balance	15,364	15,343	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	5,280	3,123	3,123
(Recapture of) provision for credit losses	(139)	208
Ending balance	5,141	5,215	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	7,391	8,894	8,894
(Recapture of) provision for credit losses	(88)	(195)
Ending balance	7,303	7,205	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	106	93	93
(Recapture of) provision for credit losses	14	(10)
Ending balance	120	123	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	367	798	798
(Recapture of) provision for credit losses	35	(13)
Ending balance	402	293	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	636	764	764
(Recapture of) provision for credit losses	87	(65)
Ending balance	723	830	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	1,584	1,127	1,127
(Recapture of) provision for credit losses	91	75
Charge-offs	(1)	(11)
Recoveries	1	3
Ending balance	$ 1,675	1,677	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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- Definition

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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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

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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