Note 3 - Loans and Allowance for Credit Losses - Activity in Allowance for Loan Losses and the Recorded Investments in Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Balance	$ 56,737	$ 56,666	$ 58,191	$ 54,454
Financing Receivable, Credit Loss, Expense (Reversal)	(1,800)	1,600	(3,600)	3,700
Charge-offs	(10)	(38)	(15)	(101)
Recoveries	514	147	865	322
Balance	55,441	58,375	55,441	58,375
Commercial Portfolio Segment [Member]
Charge-offs			(8)	(11)
Retail Portfolio Segment [Member]
Charge-offs			(7)	(90)
Unallocated Financing Receivables [Member]
Balance	23	3	83	27
Financing Receivable, Credit Loss, Expense (Reversal)	85	140	25	116
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance	108	143	108	143
Commercial and Industrial [Member] \| Commercial Portfolio Segment [Member]
Balance	12,824	11,798	12,576	11,165
Financing Receivable, Credit Loss, Expense (Reversal)	740	(39)	832	559
Charge-offs	(8)	(11)	(8)	(11)
Recoveries	217	23	373	58
Balance	13,773	11,771	13,773	11,771
Vacant Land and Land Development and Residential Construction Loan [Member] \| Commercial Portfolio Segment [Member]
Balance	545	386	478	367
Financing Receivable, Credit Loss, Expense (Reversal)	(12)	0	19	18
Charge-offs	0	0	0	0
Recoveries	13	1	49	2
Balance	546	387	546	387
Real Estate Owner Occupied Loan [Member] \| Commercial Portfolio Segment [Member]
Balance	7,845	7,679	7,629	7,671
Financing Receivable, Credit Loss, Expense (Reversal)	199	11	405	17
Charge-offs	0	0	0	0
Recoveries	4	1	14	3
Balance	8,048	7,691	8,048	7,691
Real Estate Non Owner Occupied Loan [Member] \| Commercial Portfolio Segment [Member]
Balance	14,661	11,946	15,074	10,919
Financing Receivable, Credit Loss, Expense (Reversal)	(2,485)	1,854	(2,898)	2,881
Charge-offs	0	0	0	0
Recoveries	228	0	228	0
Balance	12,404	13,800	12,404	13,800
Real Estate Multi Family and Residential Rental Loan [Member] \| Commercial Portfolio Segment [Member]
Balance	4,685	3,878	5,514	3,667
Financing Receivable, Credit Loss, Expense (Reversal)	368	416	(465)	622
Charge-offs	0	0	0	0
Recoveries	4	3	8	8
Balance	5,057	4,297	5,057	4,297
One to Four Family Mortgages [Member] \| Retail Portfolio Segment [Member]
Balance	13,464	18,874	14,199	18,702
Financing Receivable, Credit Loss, Expense (Reversal)	(803)	(989)	(1,668)	(803)
Charge-offs	0	(25)	0	(86)
Recoveries	38	105	168	152
Balance	12,699	17,965	12,699	17,965
Other Consumer Loans [Member] \| Retail Portfolio Segment [Member]
Balance	2,690	2,102	2,638	1,936
Financing Receivable, Credit Loss, Expense (Reversal)	108	207	150	290
Charge-offs	(2)	(2)	(7)	(4)
Recoveries	10	14	25	99
Balance	$ 2,806	$ 2,321	$ 2,806	$ 2,321