Note 13 - Fair Value Measurements - Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets	$ 1,683	$ 2,443
Fair Value, Inputs, Level 1 [Member]
Assets	0	0
Fair Value, Inputs, Level 2 [Member]
Assets	0	0
Fair Value, Inputs, Level 3 [Member]
Assets	1,683	2,443
Impaired Loans [Member]
Assets	1,515	2,245
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
Assets	0	0
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Assets	0	0
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Assets	1,515	2,245
Other Real Estate Owned [Member]
Assets	168	198
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member]
Assets	0	0
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
Assets	0	0
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Assets	$ 168	$ 198