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ALLOWANCE FOR LOAN LOSSES - Financing Receivables, Aging of Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		$ 1,275	$ 1,395
Total Past Due and Non-accrual		1,468	1,666
Current		973,706	909,843
Total Loans Receivable		975,174	911,509
30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		193	271
90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable		900,364	824,143
Commercial Real Estate Portfolio Segment | Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		191	201
Total Past Due and Non-accrual		191	201
Current		281,479	178,828
Total Loans Receivable	[1]	281,670	179,029
Commercial Real Estate Portfolio Segment | Commercial Business | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Commercial Business | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		1,005	1,014
Total Past Due and Non-accrual		1,005	1,014
Current		524,972	506,857
Total Loans Receivable		525,977	507,871
Commercial Real Estate Portfolio Segment | Commercial Real Estate | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Commercial Real Estate | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0	0
Total Past Due and Non-accrual		0	0
Current		14,531	14,026
Total Loans Receivable		14,531	14,026
Commercial Real Estate Portfolio Segment | Land | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Land | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Multi-Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0	0
Total Past Due and Non-accrual		0	0
Current		49,878	58,374
Total Loans Receivable		49,878	58,374
Commercial Real Estate Portfolio Segment | Multi-Family | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Multi-Family | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Real Estate Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0	0
Total Past Due and Non-accrual		0	0
Current		28,308	64,843
Total Loans Receivable		28,308	64,843
Commercial Real Estate Portfolio Segment | Real Estate Construction | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial Real Estate Portfolio Segment | Real Estate Construction | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		79	180
Total Past Due and Non-accrual		272	451
Current		74,538	86,915
Total Loans Receivable		74,810	87,366
Consumer | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		193	271
Consumer | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 0	$ 0
[1] SBA PPP loans totaled $110.8 million and none at September 30, 2020 and March 31, 2020, respectively.

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