Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Nonperforming Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Nonperforming assets:
Nonaccrual loans		$ 311	$ 6
Restructured loans in nonaccrual		3,109	2,763
Total nonperforming loans	[1]	3,420	2,769
Other real estate owned, net		2,052	2,817
Total nonperforming assets		$ 5,472	$ 5,586
Ratio of nonperforming assets to loans, net of unearned income and deferred fees and costs, plus other real estate owned		0.77%	0.83%
Ratio of allowance for loan losses to nonperforming loans(1)	[2]	216.08%	286.20%

[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.