Note 7 - Loans Receivable and Allowance for Credit Losses - Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans receivable	$ 3,064,219	$ 2,754,394	$ 2,562,068	$ 2,514,123
Loans receivable greater than 90 days and accruing	1,935			323
Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	11,795			4,851
Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	3,307			4,706
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	15,450			12,864
Financial Asset, Past Due [Member]
Loans receivable	30,552			22,421
Financial Asset, Not Past Due [Member]
Loans receivable	3,033,667			2,491,702
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	915,494			780,311
Loans receivable greater than 90 days and accruing	0			0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	76			0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	777			0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	600			4,493
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	1,453			4,493
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	914,041			775,818
Construction and Land Development Portfolio Segment [Member]
Loans receivable	226,627			216,008
Loans receivable greater than 90 days and accruing	0			0
Construction and Land Development Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	0			0
Construction and Land Development Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0			0
Construction and Land Development Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	9,052			0
Construction and Land Development Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	9,052			0
Construction and Land Development Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	217,575			216,008
Commercial Portfolio Segment [Member]
Loans receivable	303,518			252,376
Loans receivable greater than 90 days and accruing	0			0
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	5,729			0
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	248			0
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	304			2,558
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	6,281			2,558
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	297,237			249,818
Owner Occupied Real Estate [Member]
Loans receivable	557,496			526,570
Loans receivable greater than 90 days and accruing	0			0
Owner Occupied Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	5,008			0
Owner Occupied Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	0			4,139
Owner Occupied Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	2,759			3,714
Owner Occupied Real Estate [Member] | Financial Asset, Past Due [Member]
Loans receivable	7,767			7,853
Owner Occupied Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	549,729			518,717
Consumer Portfolio Segment [Member]
Loans receivable	95,618			83,487
Loans receivable greater than 90 days and accruing	15			5
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	594			92
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	261			20
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	815			1,080
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	1,670			1,192
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	93,948			82,295
Residential Portfolio Segment [Member]
Loans receivable	954,679			536,332
Loans receivable greater than 90 days and accruing	0			0
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	0			3,165
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	334			0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0			701
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	334			3,866
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	954,345			532,466
Paycheck Protection Program CARES Act [Member]
Loans receivable	10,787			119,039
Loans receivable greater than 90 days and accruing	1,920			318
Paycheck Protection Program CARES Act [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans receivable	388			1,594
Paycheck Protection Program CARES Act [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans receivable	1,687			547
Paycheck Protection Program CARES Act [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	1,920			318
Paycheck Protection Program CARES Act [Member] | Financial Asset, Past Due [Member]
Loans receivable	3,995			2,459
Paycheck Protection Program CARES Act [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	$ 6,792			$ 116,580