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Investment Securities-Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Mar. 31, 2020
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | $ 9,875 | $ 10,151
Held-to-maturity, Gross Unrealized Gains | 429 | 418
Held-to-maturity, Gross Unrealized Losses | 0 | 5
Held-to-maturity, Fair Value | 10,304 | 10,564
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 63,654 | 64,897
Available-for-sale, Gross Unrealized Gains | 220 | 1,115
Available-for-sale, Gross Unrealized Losses | 362 | 183
Available-for-sale, Fair Value | 63,512 | 65,829
Government National Mortgage Association (GNMA) |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | 903 | 972
Held-to-maturity, Gross Unrealized Gains | 78 | 76
Held-to-maturity, Gross Unrealized Losses | 0 | 0
Held-to-maturity, Fair Value | 981 | 1,048
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 1,867 | 3,510
Available-for-sale, Gross Unrealized Gains | 72 | 77
Available-for-sale, Gross Unrealized Losses | 0 | 0
Available-for-sale, Fair Value | 1,939 | 3,587
Federal Home Loan Mortgage Corporation (FHLMC) |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 5,051 | 9,244
Available-for-sale, Gross Unrealized Gains | 127 | 312
Available-for-sale, Gross Unrealized Losses | 3 | 18
Available-for-sale, Fair Value | 5,175 | 9,538
Federal National Mortgage Association (FNMA) |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | 7,972 | 8,179
Held-to-maturity, Gross Unrealized Gains | 351 | 342
Held-to-maturity, Gross Unrealized Losses | 0 | 0
Held-to-maturity, Fair Value | 8,323 | 8,521
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost |  | 21,495
Available-for-sale, Gross Unrealized Gains |  | 673
Available-for-sale, Gross Unrealized Losses |  | 0
Available-for-sale, Fair Value |  | 22,168
Mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Total | 8,875 | 9,151
Held-to-maturity, Gross Unrealized Gains | 429 | 418
Held-to-maturity, Gross Unrealized Losses | 0 | 0
Held-to-maturity, Fair Value | 9,304 | 9,569
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 6,918 | 34,249
Available-for-sale, Gross Unrealized Gains | 199 | 1,062
Available-for-sale, Gross Unrealized Losses | 3 | 18
Available-for-sale, Fair Value | 7,114 | 35,293
US Government Agency Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 22,699 | 26,616
Available-for-sale, Gross Unrealized Gains | 15 | 20
Available-for-sale, Gross Unrealized Losses | 190 | 155
Available-for-sale, Fair Value | 22,524 | 26,481
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 | 0 | 0
Held-to-maturity, Gross Unrealized Losses | 0 | 5
Held-to-maturity, Fair Value | 1,000 | 995
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 6,279 | 4,032
Available-for-sale, Gross Unrealized Gains | 4 | 33
Available-for-sale, Gross Unrealized Losses | 0 | 10
Available-for-sale, Fair Value | 6,283 | $ 4,055
Municipal Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 17,779 |
Available-for-sale, Gross Unrealized Gains | 0 |
Available-for-sale, Gross Unrealized Losses | 169 |
Available-for-sale, Fair Value | 17,610 |
Asset-backed Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale, Amortized Cost | 9,979 |
Available-for-sale, Gross Unrealized Gains | 2 |
Available-for-sale, Gross Unrealized Losses | 0 |
Available-for-sale, Fair Value | $ 9,981 |

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