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Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Mar. 31, 2019
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Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | $ 10,447 | $ 11,137
Held-to-maturity, Gross Unrealized Gains | 163 | 57
Held-to-maturity, Gross Unrealized Losses | 6 | 87
Held-to-maturity, Fair Value | 10,604 | 11,107
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 70,464 | 80,784
Available-for-sale, Gross Unrealized Gains | 476 | 225
Available-for-sale, Gross Unrealized Losses | 497 | 1,164
Available-for-sale, Fair Value | 70,443 | 79,845
Government National Mortgage Association (GNMA) |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | 1,044 | 1,214
Held-to-maturity, Gross Unrealized Gains | 66 | 40
Held-to-maturity, Gross Unrealized Losses | 0 | 0
Held-to-maturity, Fair Value | 1,110 | 1,254
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 3,717 | 4,443
Available-for-sale, Gross Unrealized Gains | 23 | 25
Available-for-sale, Gross Unrealized Losses | 21 | 86
Available-for-sale, Fair Value | 3,719 | 4,382
Federal Home Loan Mortgage Corporation (FHLMC) |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 9,824 | 11,104
Available-for-sale, Gross Unrealized Gains | 116 | 69
Available-for-sale, Gross Unrealized Losses | 14 | 148
Available-for-sale, Fair Value | 9,926 | 11,025
Federal National Mortgage Association (FNMA) |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | 8,403 | 8,923
Held-to-maturity, Gross Unrealized Gains | 90 | 0
Held-to-maturity, Gross Unrealized Losses | 6 | 87
Held-to-maturity, Fair Value | 8,487 | 8,836
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 24,265 | 27,094
Available-for-sale, Gross Unrealized Gains | 287 | 131
Available-for-sale, Gross Unrealized Losses | 235 | 617
Available-for-sale, Fair Value | 24,317 | 26,608
Mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | 9,447 | 10,137
Held-to-maturity, Gross Unrealized Gains | 156 | 40
Held-to-maturity, Gross Unrealized Losses | 6 | 87
Held-to-maturity, Fair Value | 9,597 | 10,090
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 37,806 | 42,641
Available-for-sale, Gross Unrealized Gains | 426 | 225
Available-for-sale, Gross Unrealized Losses | 270 | 851
Available-for-sale, Fair Value | 37,962 | 42,015
US Government Agency Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 28,621 | 33,089
Available-for-sale, Gross Unrealized Gains | 0 | 0
Available-for-sale, Gross Unrealized Losses | 225 | 236
Available-for-sale, Fair Value | 28,396 | 32,853
Corporate Bonds |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | 1,000 | 1,000
Held-to-maturity, Gross Unrealized Gains | 7 | 17
Held-to-maturity, Gross Unrealized Losses | 0 | 0
Held-to-maturity, Fair Value | 1,007 | 1,017
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 4,037 | 5,054
Available-for-sale, Gross Unrealized Gains | 50 | 0
Available-for-sale, Gross Unrealized Losses | 2 | 77
Available-for-sale, Fair Value | $ 4,085 | $ 4,977

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