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Note 2 - Investments - Investments Classified by Contractual Maturity Date (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Jun. 30, 2024
Amortized Cost, available for sale $ 5,717 [1] $ 6,204
Amortized Cost, held to maturity debt securities, due after five years through ten years 1,000  
Investments in debt securities [1] 3,742  
Fair Value, held to maturity debt securities, due after five years through ten years $ 891  
[1] Principal payments of $750,000 are due quarterly with a final maturity in January 2026.