Note 3 - Loans and Allowance for Credit Losses on Loans - Non-accrual Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2023		Dec. 31, 2022
Non-accrual with no allowance		$ 3,974		$ 2,295
Non-accrual loans		17,227		14,242
Past due 90-days-or-more and still accruing interest		1	[1]	892
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Home Equity Line of Credit [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		304		205
Past due 90-days-or-more and still accruing interest		0	[1]	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Credit Cards [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		12		0
Past due 90-days-or-more and still accruing interest		1	[1]	7
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Commercial Real Estate Portfolio Segment [Member]
Non-accrual with no allowance		0		1,370
Non-accrual loans		8,271		10,232
Past due 90-days-or-more and still accruing interest		0	[1]	78
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		7,162		7,707
Past due 90-days-or-more and still accruing interest		0	[1]	78
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Non-accrual with no allowance		0		1,370
Non-accrual loans		1,109		2,525
Past due 90-days-or-more and still accruing interest		0	[1]	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Non-accrual with no allowance		3,737		403
Non-accrual loans		5,229		1,182
Past due 90-days-or-more and still accruing interest		0	[1]	259
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Commercial and Industrial Portfolio Segment [Member] | PPP Loans [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		0		21
Past due 90-days-or-more and still accruing interest		0	[1]	28
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Non-accrual with no allowance		0		273
Non-accrual loans		58		348
Past due 90-days-or-more and still accruing interest		0	[1]	300
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Total Commercial and Industrial Portfolio Segment [Member]
Non-accrual with no allowance		3,737		676
Non-accrual loans		5,287		1,551
Past due 90-days-or-more and still accruing interest		0	[1]	587
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Residential Real Estate Portfolio Segment [Member]
Non-accrual with no allowance		237		249
Non-accrual loans		3,087		2,020
Past due 90-days-or-more and still accruing interest		0	[1]	220
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		378		219
Past due 90-days-or-more and still accruing interest		0	[1]	220
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Non-accrual with no allowance		237		249
Non-accrual loans		2,709		1,801
Past due 90-days-or-more and still accruing interest		0	[1]	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Construction and Development [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		0		0
Past due 90-days-or-more and still accruing interest		0	[1]	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Consumer Portfolio Segment [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		266		234
Past due 90-days-or-more and still accruing interest		0	[1]	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]			0
Finance Leases Portfolio Segment [Member]
Non-accrual with no allowance		0		0
Non-accrual loans		0		0
Past due 90-days-or-more and still accruing interest		$ 0	[1]	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]			$ 0

[1] Does not included TDRs captured in the non-accrual column.