Note 5 - Credit Quality - Loans Modified as Troubled Debt Restructurings by Loan Class and Accrual Status (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Nonaccrual	[1]	$ 1,475	$ 2,519
Accrual		7,028	8,652
TDRs		8,503	11,171
Allowance for credit losses related to TDRs		0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Nonaccrual	[1]	0	396
Accrual		409	470
TDRs		409	866
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Nonaccrual	[1]	147	857
Accrual		844	1,100
TDRs		991	1,957
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Nonaccrual	[1]	0	0
Accrual		766	2,021
TDRs		766	2,021
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Nonaccrual	[1]	0	0
Accrual		59	67
TDRs		59	67
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Nonaccrual	[1]	1,328	1,266
Accrual		4,925	4,755
TDRs		6,253	6,021
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Nonaccrual	[1]	0	0
Accrual		0	212
TDRs		0	212
Consumer and Other Portfolio Segment [Member]
TDRs			27
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Nonaccrual	[1]	0	0
Accrual		25	$ 27
TDRs		$ 25

[1] Nonaccrual TDRs are included in total nonaccrual loans disclosed in the nonaccrual table above.