LOANS AND ACL - Reconciliation of the allowance for loan losses (Details) - USD ($)	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Reconciliation of the allowance for loan losses
Beginning balance	$ 15,374,000	$ 15,364,000	$ 15,309,000
Provision for (recapture of) credit losses	1,172,000	100,000
Charge-offs	(1,356,000)	(123,000)	(13,000)
Recoveries	58,000	33,000	26,000
Ending balance	15,248,000	15,374,000	15,364,000
Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		42,000	42,000
Ending balance			42,000
Commercial and Construction \| Commercial Business
Reconciliation of the allowance for loan losses
Charge-offs	(399,000)
Commercial Real Estate Portfolio Segment \| Commercial Business
Reconciliation of the allowance for loan losses
Beginning balance	5,033,000	5,280,000	3,123,000
Provision for (recapture of) credit losses	(47,000)	(248,000)	273,000
Charge-offs	(399,000)
Recoveries		1,000
Ending balance	4,587,000	5,033,000	5,280,000
Commercial Real Estate Portfolio Segment \| Commercial Business \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		1,884,000
Ending balance			1,884,000
Commercial Real Estate Portfolio Segment \| Commercial Real Estate
Reconciliation of the allowance for loan losses
Beginning balance	7,492,000	7,391,000	8,894,000
Provision for (recapture of) credit losses	946,000	181,000	(9,000)
Charge-offs	(911,000)	(80,000)
Ending balance	7,527,000	7,492,000	7,391,000
Commercial Real Estate Portfolio Segment \| Commercial Real Estate \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		(1,494,000)
Ending balance			(1,494,000)
Commercial Real Estate Portfolio Segment \| Land
Reconciliation of the allowance for loan losses
Beginning balance	83,000	106,000	93,000
Provision for (recapture of) credit losses	109,000	(23,000)	(27,000)
Ending balance	192,000	83,000	106,000
Commercial Real Estate Portfolio Segment \| Land \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		40,000
Ending balance			40,000
Commercial Real Estate Portfolio Segment \| Multi-Family
Reconciliation of the allowance for loan losses
Beginning balance	444,000	367,000	798,000
Provision for (recapture of) credit losses	24,000	77,000	61,000
Ending balance	468,000	444,000	367,000
Commercial Real Estate Portfolio Segment \| Multi-Family \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		(492,000)
Ending balance			(492,000)
Commercial Real Estate Portfolio Segment \| Real Estate Construction
Reconciliation of the allowance for loan losses
Beginning balance	480,000	636,000	764,000
Provision for (recapture of) credit losses	(48,000)	(156,000)	(259,000)
Ending balance	432,000	480,000	636,000
Commercial Real Estate Portfolio Segment \| Real Estate Construction \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		131,000
Ending balance			131,000
Consumer
Reconciliation of the allowance for loan losses
Beginning balance	1,842,000	1,584,000	1,127,000
Provision for (recapture of) credit losses	188,000	269,000	(39,000)
Charge-offs	(46,000)	(43,000)	(13,000)
Recoveries	58,000	32,000	26,000
Ending balance	$ 2,042,000	1,842,000	1,584,000
Consumer \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		483,000
Ending balance			483,000
Unallocated
Reconciliation of the allowance for loan losses
Beginning balance			510,000
Unallocated \| Adjustment \| ASU 2016-13
Reconciliation of the allowance for loan losses
Beginning balance		$ (510,000)
Ending balance			$ (510,000)

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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+ References

No definition available.

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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 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: 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

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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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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