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ALLOWANCE FOR LOAN LOSSES - Financing Receivables, Aging of Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		$ 393	$ 1,395
Total Past Due and Non-accrual		721	1,666
Current		930,747	909,843
Total Loans Receivable		931,468	911,509
30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		328	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		865,318	824,143
Commercial Real Estate Portfolio Segment | Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		187	201
Total Past Due and Non-accrual		218	201
Current		252,469	178,828
Total Loans Receivable	[1]	252,687	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		31	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		149	1,014
Total Past Due and Non-accrual		149	1,014
Current		541,268	506,857
Total Loans Receivable		541,417	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		12,126	14,026
Total Loans Receivable		12,126	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		42,166	58,374
Total Loans Receivable		42,166	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		16,922	64,843
Total Loans Receivable		16,922	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		57	180
Total Past Due and Non-accrual		354	451
Current		65,796	86,915
Total Loans Receivable		66,150	87,366
Consumer | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		297	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 $80.8 million and none at December 31, 2020 and March 31, 2020, respectively.

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