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Note 3 - Investments in Securities - Schedule of Investments Classified by Contractual Maturity Date (Details) $ in Thousands | Mar. 31, 2026 USD ($)
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Within 1 year, Available-for-sale, fair value | $ 6,955
Within 1 year, Held-to-maturity, amortized cost | 6,038
Within 1 year, Held-to-maturity, fair value | 6,034
After 1 year through 5 years, Available-for-sale, fair value | 4,189
After 1 year through 5 years, Held-to-maturity, amortized cost | 8,017
After 1 year through 5 years, Held-to-maturity, fair value | 8,052
After 5 years through 10 years, Available-for-sale, fair value | 12,895
After 5 years through 10 years, Held-to-maturity, amortized cost | 11,715
After 5 years through 10 years, Held-to-maturity, fair value | 10,960
After 10 years, Available-for-sale, fair value | 13,027
After 10 years, Held-to-maturity, amortized cost | 25,854
After 10 years, Held-to-maturity, fair value | 22,998
Available-for-sale, Fair Value | 37,066
Held-to-maturity, amortized Cost | 51,624
Held-to-maturity, Fair Value | $ 48,044

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