LOANS AND ALLOWANCE FOR CREDIT LOSSES - Additional information (Details)	3 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($) loan	Jun. 30, 2022 USD ($)	Mar. 31, 2023 USD ($) loan	Apr. 01, 2023 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred loan fees	$ 4,300,000		$ 4,400,000
Discount On Loans Receivable	1,400,000		1,400,000
Premiums On Loans Receivable.	2,100,000		$ 2,100,000
Loans Pledged as Collateral	$ 989,064,000
Percentage Of Loans And Extensions Of Credit Outstanding	15.00%
Number of loans to one borrower over regulatory limit | loan	0		0
Allowance for credit losses (in dollars)	$ 15,343,000		$ 15,309,000
Nonaccrual loans with no ACL	187,000
Nonaccrual loans with ACL	41,000
Nonaccruals, Allowance	1,000
Interest income foregone on non-accrual loans	3,000	$ 3,000	14,000
Total loans	$ 1,004,407,000
Number of loan modifications approved | loan	0
Troubled debt restructurings		$ 698,000
Percentage of delinquent loan amount	75.00%
30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 270,000
ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number Of impaired loans on nonaccrual status | loan				2
Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses (in dollars)			42,000	$ 42,000
Fully Guaranteed SBA Or USDA Loans | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	930,000
Asset Pledged as Collateral | FHLB and FRB Borrowing Arrangements
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Pledged as Collateral	592,000,000.0
Asset Pledged as Collateral | Financing receivable | Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Pledged as Collateral	74,000
Asset Pledged as Collateral | Financing receivable | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Pledged as Collateral	95,000
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	906,011,000
Commercial Real Estate Portfolio Segment | Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses (in dollars)	5,215,000		3,123,000
Total loans	244,725,000
Commercial Real Estate Portfolio Segment | Commercial Business | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	270,000
Commercial Real Estate Portfolio Segment | Commercial Business | Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses (in dollars)			1,884,000
Commercial Real Estate Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses (in dollars)	7,205,000		8,894,000
Total loans	556,639,000
Commercial Real Estate Portfolio Segment | Commercial Real Estate | Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses (in dollars)			(1,494,000)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses (in dollars)	1,677,000		1,127,000
Total loans	98,396,000
Consumer | Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses (in dollars)			$ 483,000
Consumer | Real estate one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 96,607,000