Note 9 - Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Fair Value	$ 225	$ 397
Total Losses	0	0
Fair Value, Inputs, Level 1 [Member]
Fair Value	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value		0
Fair Value, Inputs, Level 3 [Member]
Fair Value	225	397
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value	225	225
Total Losses	0	0
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value	0	0
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value	0	0
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value	$ 225	225
Impaired Loans [Member] | Residential Portfolio Segment [Member]
Fair Value		172
Total Losses		0
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value		0
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value		0
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value		$ 172