Note 10 - Short-term Borrowings (Details Textual) $ in Millions	Dec. 31, 2022 USD ($)
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 1,000.0
Federal Funds [Member]
Line of Credit Facility, Maximum Borrowing Capacity	60.0
Federal Reserve Discount Window [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 220.8