Note 9 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Collateral dependent loans, fair value	$ 2,084
collateral depended loans, total loss	931	$ 0
Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0
Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	0
Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	2,084
Commercial Loans [Member]
Collateral dependent loans, fair value	24		$ 24
collateral depended loans, total loss	0
Commercial Loans [Member] \| Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0		0
Commercial Loans [Member] \| Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	0		0
Commercial Loans [Member] \| Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	24		24
Agricultural Loans [Member]
Collateral dependent loans, fair value	2,060
collateral depended loans, total loss	931
Agricultural Loans [Member] \| Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0
Agricultural Loans [Member] \| Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	0
Agricultural Loans [Member] \| Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	2,060
Real Estate Loan [Member]
other real estate owned, total loss	0
Real Estate Loan [Member] \| Residential Portfolio Segment [Member]
RE – Residential	91		91
Real Estate Loan [Member] \| Fair Value, Inputs, Level 1 [Member]
RE – Residential	0		0
Real Estate Loan [Member] \| Fair Value, Inputs, Level 2 [Member]
RE – Residential	0		0
Real Estate Loan [Member] \| Fair Value, Inputs, Level 3 [Member]
RE – Residential	$ 91		$ 91