Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Nonperforming Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Nonperforming assets:
Nonaccrual loans		$ 164	$ 311
Restructured loans in nonaccrual		3,211	3,109
Total nonperforming loans	[1]	3,375	3,420
Other real estate owned, net		1,612	2,052
Total nonperforming assets		$ 4,987	$ 5,472
Ratio of nonperforming assets to loans, net of unearned income and deferred fees and costs, plus other real estate owned		0.68%	0.77%
Ratio of allowance for loan losses to nonperforming loans(1)	[2]	203.35%	216.08%

[1] Only classes with past due or nonaccrual loans are presented

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