Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Nonperforming Assets (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Nonaccrual loans		$ 118	$ 0	$ 39
Restructured loans in nonaccrual		2,770	2,873	3,075
Total nonperforming loans		2,888	2,873	3,114
Other real estate owned, net		907	957	957
Total nonperforming assets		$ 3,795	$ 3,830	$ 4,071
Ratio of nonperforming assets to loans, net of unearned income and deferred fees and costs, plus other real estate owned		0.44%	0.48%	0.51%
Ratio of allowance for loan losses to nonperforming loans	[1]	284.18%	267.11%	247.21%

[1] The Company defines nonperforming loans as nonaccrual loans and restructured loans that are nonaccrual. Loans 90 days past due and still accruing and accruing restructured loans are excluded.