Note 13 - Assets and Liabilities Measured and Reported at Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Other real estate owned, gain (loss)		$ (250)	$ (5)
Fair Value, Nonrecurring [Member]
Collateral dependent loans, fair value	$ 0	0		$ 0
Collateral dependent loans	1,377	1,377		377
Other real estate owned, fair value	0	0		0
Other real estate owned, gain (loss)	250	250		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0	0		0
Other real estate owned, fair value	0	0		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	12,141	12,141		20,637
Other real estate owned, fair value	427	427		677
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	12,141	12,141		20,637
Other real estate owned, fair value	$ 427	$ 427		$ 677