Note 16 - Balance Sheet Offsetting - Financial Instruments That Are Eligible for Offset in the Consolidated Balance Sheet (Details) - USD ($)	Sep. 30, 2026	Dec. 31, 2025
Derivative assets, gross	$ 40,142,000	$ 26,472,000
Derivative assets, gross amounts offset	37,136,000	6,089,000
Derivative assets, net	3,006,000	20,383,000
Derivative assets, financial instrument not offset	0	0
Derivatives, collateral posted	1,655,000	1,409,000
Derivative assets, net amount	1,351,000	18,974,000
Derivative liabilities, gross	36,243,000	28,917,000
Derivative liabilities, gross amounts offset	0	0
Derivative liabilities, net	36,243,000	28,917,000
Derivative liabilities, financial instrument not offset	0	0
Derivatives, collateral posted	0	0
Derivative liabilties, net amount	$ 36,243,000	$ 28,917,000