Note 2 - Investments - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands		Dec. 31, 2024		Jun. 30, 2024
Amortized Cost, available for sale		$ 5,187	[1]	$ 6,204
Amortized Cost, held to maturity debt securities, due after five years through ten years		1,000
Investments in debt securities	[1]	3,037
Fair Value, held to maturity debt securities, due after five years through ten years		$ 926

[1] Principal payments of $750,000 are due quarterly with a final maturity in January 2026.