Note 6 - Loans and Allowance for Credit Losses on Loans (ACLL) - Allowance for Credit Loss (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2024		Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss	$ 48,090	[1]	$ 38,899	$ 38,899
Financing Receivable, Provision for Credit Losses loans	1,050		1,875	11,455
Financing Receivable, Charge offs	(776)		(165)	(4,844)
Financing Receivable, Recoveries	868		227	1,085
Financing Receivable, Allowance for Credit Loss	49,232		40,836	48,090	[1]
Financing Receivable, Adjustment				1,495
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss	4,319		4,941	4,941
Financing Receivable, Provision for Credit Losses loans	3,519		(242)	(570)
Financing Receivable, Charge offs	(38)		(21)	(62)
Financing Receivable, Recoveries	5		2	10
Financing Receivable, Allowance for Credit Loss	7,805		4,680	4,319
Financing Receivable, Adjustment				0
Commercial Real Estate Owner Occupied Professional, Medical [Member]
Financing Receivable, Allowance for Credit Loss	1,207		966	966
Financing Receivable, Provision for Credit Losses loans	64		(95)	216
Financing Receivable, Charge offs	0		0	(3)
Financing Receivable, Recoveries	0		0	0
Financing Receivable, Allowance for Credit Loss	1,271		871	1,207
Financing Receivable, Adjustment				28
Commercial Real Estate Owner Occupied, Retail [Member]
Financing Receivable, Allowance for Credit Loss	543		1,176	1,176
Financing Receivable, Provision for Credit Losses loans	(87)		(51)	(716)
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	0		0	1
Financing Receivable, Allowance for Credit Loss	456		1,125	543
Financing Receivable, Adjustment				82
Commercial Real Estate Owner Occupied, Other [Member]
Financing Receivable, Allowance for Credit Loss	601		426	426
Financing Receivable, Provision for Credit Losses loans	561		34	(181)
Financing Receivable, Charge offs	0		0	(28)
Financing Receivable, Recoveries	0		0	0
Financing Receivable, Allowance for Credit Loss	1,162		460	601
Financing Receivable, Adjustment				384
Commercial Real Estate Nonowner Occupied Hotels and Motel [Member]
Financing Receivable, Allowance for Credit Loss	3,124		1,203	1,203
Financing Receivable, Provision for Credit Losses loans	589		(65)	1,921
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	0		0	0
Financing Receivable, Allowance for Credit Loss	3,713		1,138	3,124
Financing Receivable, Adjustment				0
Commercial Real Estate Nonowner Occupied Mini Storage [Member]
Financing Receivable, Allowance for Credit Loss	79		82	82
Financing Receivable, Provision for Credit Losses loans	107		8	(3)
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	0		0	0
Financing Receivable, Allowance for Credit Loss	186		90	79
Financing Receivable, Adjustment				0
Multifamily [Member]
Financing Receivable, Allowance for Credit Loss	3,144		2,907	2,907
Financing Receivable, Provision for Credit Losses loans	(30)		395	288
Financing Receivable, Charge offs	0		0	(57)
Financing Receivable, Recoveries	1		1	5
Financing Receivable, Allowance for Credit Loss	3,115		3,303	3,144
Financing Receivable, Adjustment				1
Commercial Real Estate Nonowner Occupied, Retail [Member]
Financing Receivable, Allowance for Credit Loss	2,518		1,362	1,362
Financing Receivable, Provision for Credit Losses loans	111		510	4,601
Financing Receivable, Charge offs	0		0	(3,658)
Financing Receivable, Recoveries	18		69	114
Financing Receivable, Allowance for Credit Loss	2,647		1,941	2,518
Financing Receivable, Adjustment				99
Commercial Real Estate Nonowner Occupied, Other [Member]
Financing Receivable, Allowance for Credit Loss	2,747		2,452	2,452
Financing Receivable, Provision for Credit Losses loans	446		(46)	(349)
Financing Receivable, Charge offs	(286)		0	0
Financing Receivable, Recoveries	3		4	12
Financing Receivable, Allowance for Credit Loss	2,910		2,410	2,747
Financing Receivable, Adjustment				632
Land and Land Improvements [Member]
Financing Receivable, Allowance for Credit Loss	5,576		3,482	3,482
Financing Receivable, Provision for Credit Losses loans	(2,215)		486	2,085
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	224		2	8
Financing Receivable, Allowance for Credit Loss	3,585		3,970	5,576
Financing Receivable, Adjustment				1
Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss	14,283		11,138	11,138
Financing Receivable, Provision for Credit Losses loans	(1,636)		621	3,145
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	0		0	0
Financing Receivable, Allowance for Credit Loss	12,647		11,759	14,283
Financing Receivable, Adjustment				0
Residential 1-4 Family Real Estate, Personal Residence [Member]
Financing Receivable, Allowance for Credit Loss	3,317		2,939	2,939
Financing Receivable, Provision for Credit Losses loans	(314)		(468)	57
Financing Receivable, Charge offs	(6)		(23)	(89)
Financing Receivable, Recoveries	34		71	341
Financing Receivable, Allowance for Credit Loss	3,031		2,519	3,317
Financing Receivable, Adjustment				69
Residential 1-4 Family Real Estate, Rental Small Loan [Member]
Financing Receivable, Allowance for Credit Loss	1,871		1,907	1,907
Financing Receivable, Provision for Credit Losses loans	(70)		(50)	(135)
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	74		8	31
Financing Receivable, Allowance for Credit Loss	1,875		1,865	1,871
Financing Receivable, Adjustment				68
Residential 1-4 Family Real Estate, Rental Large Loan [Member]
Financing Receivable, Allowance for Credit Loss	2,846		2,668	2,668
Financing Receivable, Provision for Credit Losses loans	(399)		1,165	(112)
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	440		0	289
Financing Receivable, Allowance for Credit Loss	2,887		3,833	2,846
Financing Receivable, Adjustment				1
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss	1,430		705	705
Financing Receivable, Provision for Credit Losses loans	(58)		(310)	543
Financing Receivable, Charge offs	(15)		0	0
Financing Receivable, Recoveries	11		13	52
Financing Receivable, Allowance for Credit Loss	1,368		408	1,430
Financing Receivable, Adjustment				130
Mortgage Warehouse Lines [Member]
Financing Receivable, Allowance for Credit Loss	0		0	0
Financing Receivable, Provision for Credit Losses loans	0		0	0
Financing Receivable, Charge offs	0		0	0
Financing Receivable, Recoveries	0		0	0
Financing Receivable, Allowance for Credit Loss	0		0	0
Financing Receivable, Adjustment				0
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	205		174	174
Financing Receivable, Provision for Credit Losses loans	172		0	251
Financing Receivable, Charge offs	(207)		(34)	(351)
Financing Receivable, Recoveries	32		38	131
Financing Receivable, Allowance for Credit Loss	202		178	205
Financing Receivable, Adjustment				0
Credit Card Receivable [Member]
Financing Receivable, Allowance for Credit Loss	26		17	17
Financing Receivable, Provision for Credit Losses loans	3		10	93
Financing Receivable, Charge offs	(7)		(11)	(93)
Financing Receivable, Recoveries	2		1	9
Financing Receivable, Allowance for Credit Loss	24		17	26
Financing Receivable, Adjustment				0
Bank Overdrafts [Member]
Financing Receivable, Allowance for Credit Loss	254		354	354
Financing Receivable, Provision for Credit Losses loans	287		(27)	321
Financing Receivable, Charge offs	(217)		(76)	(503)
Financing Receivable, Recoveries	24		18	82
Financing Receivable, Allowance for Credit Loss	$ 348		$ 269	254
Financing Receivable, Adjustment				$ 0

[1] Derived from audited consolidated financial statements.