Note 7 - Investments, Held to Maturity ("HTM") - Schedule of Credit Ratings for Held To Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	$ 133,817	$ 135,200
Private Label Taxable Municipal Securities [Member]
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	976
Private Label Taxable Municipal Securities [Member] | Moody's, Aa1 Rating [Member]
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	976
Private Label Mortgage Backed Securities [Member]
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	7,694
Private Label Mortgage Backed Securities [Member] | Moody's, Aaa Rating [Member]
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	6,547
Private Label Mortgage Backed Securities [Member] | Moody's, A1 Rating [Member]
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	$ 1,147