Note 3 - Loans and Allowance for Credit Losses - Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Number of Contracts	10
Pre- Modification Recorded Principal Balance	$ 7,351
Post- Modification Recorded Principal Balance	$ 7,350
Commercial Portfolio Segment [Member]
Number of Contracts	3
Pre- Modification Recorded Principal Balance	$ 6,593
Post- Modification Recorded Principal Balance	$ 6,593
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Number of Contracts	3
Pre- Modification Recorded Principal Balance	$ 6,593
Post- Modification Recorded Principal Balance	$ 6,593
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Number of Contracts	0
Pre- Modification Recorded Principal Balance	$ 0
Post- Modification Recorded Principal Balance	$ 0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Number of Contracts	0
Pre- Modification Recorded Principal Balance	$ 0
Post- Modification Recorded Principal Balance	$ 0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Number of Contracts	0
Pre- Modification Recorded Principal Balance	$ 0
Post- Modification Recorded Principal Balance	$ 0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Number of Contracts	0
Pre- Modification Recorded Principal Balance	$ 0
Post- Modification Recorded Principal Balance	$ 0
Retail Portfolio Segment [Member]
Number of Contracts	7
Pre- Modification Recorded Principal Balance	$ 758
Post- Modification Recorded Principal Balance	$ 757
Retail Portfolio Segment [Member] | Home Equity Loan [Member]
Number of Contracts	0
Pre- Modification Recorded Principal Balance	$ 0
Post- Modification Recorded Principal Balance	$ 0
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Number of Contracts	7
Pre- Modification Recorded Principal Balance	$ 758
Post- Modification Recorded Principal Balance	$ 757