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Note 1 - Basis of Presentation and Accounting Policies - Held to Maturity Securities (Details) - US Treasury Securities [Member] $ in Thousands	Jun. 30, 2024 USD ($)
Held to maturity U.S. Treasury securities, amortized cost	$ 58,822
Held to maturity U.S. Treasury securities, gross unrealized gains	384
Held to maturity U.S. Treasury securities, fair value	$ 59,206

X

- Definition

Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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