Note 7 - Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Total	$ 1,883	$ 524
Fair Value, Inputs, Level 1 [Member]
Total	0	0
Fair Value, Inputs, Level 2 [Member]
Total	0	0
Fair Value, Inputs, Level 3 [Member]
Total	1,883	524
Commercial Real Estate Portfolio Segment [Member]
Impaired loans	1,883	470
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	$ 1,883	470
Commercial Portfolio Segment [Member]
Impaired loans		54
Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans		0
Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans		0
Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans		$ 54