Note 15 - Fair Value Measurement - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Collateral-dependent loans	$ 25,582	$ 33,246
Real estate owned and repossessed assets	1,380
Collateral-dependent loans	25,582	33,246
Fair Value, Inputs, Level 1 [Member]
Collateral-dependent loans	0	0
Real estate owned and repossessed assets	0
Collateral-dependent loans	0	0
Fair Value, Inputs, Level 2 [Member]
Collateral-dependent loans	0	0
Real estate owned and repossessed assets	0
Collateral-dependent loans	0	0
Fair Value, Inputs, Level 3 [Member]
Collateral-dependent loans	25,582	33,246
Real estate owned and repossessed assets	1,380
Collateral-dependent loans	$ 25,582	$ 33,246