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LOANS RECEIVABLE - Loans receivable, excluding loans held for sale (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 1,002,720	$ 911,509
Less: Allowance for loan losses		17,076	12,624	$ 11,442	$ 11,457
Loans receivable, net		985,644	898,885
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		919,749	824,143
Commercial Real Estate Portfolio Segment | Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		281,832	179,029
Less: Allowance for loan losses		2,011	2,008	2,113	1,808
Commercial Real Estate Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		527,576	507,871
Less: Allowance for loan losses		11,323	6,421	4,889	5,053
Commercial Real Estate Portfolio Segment | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		14,404	14,026
Less: Allowance for loan losses		243	230	244	254
Commercial Real Estate Portfolio Segment | Multi-Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		58,113	58,374
Less: Allowance for loan losses		879	854	699	728
Commercial Real Estate Portfolio Segment | Real Estate Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		37,824	64,843
Less: Allowance for loan losses		692	1,149	1,506	1,457
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		82,971	87,366
Less: Allowance for loan losses		1,281	1,363	$ 1,346	$ 1,447
Consumer | Real estate one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		79,582	83,150
Consumer | Other installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 3,389	$ 4,216
[1] SBA PPP loans totaled $110.3 million and none at June 30, 2020 and March 31, 2020, respectively.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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