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ALLOWANCE FOR LOAN LOSSES - Additional information (Details)	9 Months Ended
	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income foregone on non-accrual loans	$ 57,000	$ 75,000
Percentage of delinquent loan amount	75.00%
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of TDR loans default | item	1
Troubled debt restructurings (TDR) loan for nonaccrual	$ 851,000
Commercial Real Estate Portfolio Segment | Commercial and Constructions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Post-modification outstanding recorded investment amount	$ 27,000	$ 25,000
Consumer | Real estate one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Extended maturity period of loans receivable	10 years

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Represents an extended maturity period of loans receivable.

+ References

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Interest income foregone on loans not accruing. In general, when a loan is 90 days delinquent or when collection of principal or interest appears doubtful, it is placed on non-accrual status, at which time the accrual of interest ceases and a reserve for unrecoverable accrued interest is established and charged against operations. Payments received on non-accrual loans are applied to reduce the outstanding principal balance on a cash-basis method. As a general practice, a loan is not removed from non-accrual status until all delinquent principal, interest and late fees have been brought current and the borrower has demonstrated a history of performance based upon the contractual terms of the note.

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Amount of loan balance under troubled debt restructurings (TDR) for commercial real estate as nonaccrual.

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- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524

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