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Investment Securities - Schedule of amortized cost and estimated fair value of Available for sale securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023
--- | --- | ---
Available for sale |  |  |
Amortized Cost | $ 2,142 |  | $ 2,217
Gross Unrealized Gains | 0 |  | 0
Gross Unrealized (Losses) | (52) |  | (62)
Estimated Fair Value | 2,090 |  | 2,155
U.S. government agency MBS |  |  |
Available for sale |  |  |
Amortized Cost | 1,379 |  | 1,417
Gross Unrealized Gains | 0 |  | 0
Gross Unrealized (Losses) | (39) |  | (47)
Estimated Fair Value | 1,340 |  | 1,370
U.S. government sponsored enterprise MBS |  |  |
Available for sale |  |  |
Amortized Cost | 662 |  | 697
Gross Unrealized Gains | 0 |  | 0
Gross Unrealized (Losses) | (10) |  | (14)
Estimated Fair Value | 652 |  | 683
Private issue CMO |  |  |
Available for sale |  |  |
Amortized Cost | 101 | [1] | 103
Gross Unrealized Gains | 0 | [1] | 0
Gross Unrealized (Losses) | (3) | [1] | (1)
Estimated Fair Value | $ 98 | [1] | $ 102
[1] | Collateralized Mortgage Obligations (“CMO”).

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