Note 8 - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	$ 10,531	$ 10,826
Provision for (credit to) loan losses	(1,783)	458
Charge-offs	78	(161)
Recoveries	610	91
Allowance for loan losses, end of period	8,191	11,214
Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	10,531
Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(1,089)
Commercial Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	1,316	4,050
Provision for (credit to) loan losses	(940)	(658)
Charge-offs	0	0
Recoveries	593	32
Allowance for loan losses, end of period	899	3,424
Commercial Portfolio Segment [Member] | Commercial And Industrial [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	1,316
Commercial Portfolio Segment [Member] | Commercial And Industrial [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(70)
Commercial Portfolio Segment [Member] | Construction and Land Development [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	4
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	749
Commercial Portfolio Segment [Member] | Construction and Land Development [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	755
Commercial Portfolio Segment [Member] | Construction and Land Development [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(10)
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-Family Properties [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(102)
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	1,577
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-Family Properties [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	995
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-Family Properties [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	684
Commercial Portfolio Segment [Member] | Real Estate Secured By Owner-Occupied Properties [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(203)
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	972
Commercial Portfolio Segment [Member] | Real Estate Secured By Owner-Occupied Properties [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	1,549
Commercial Portfolio Segment [Member] | Real Estate Secured By Owner-Occupied Properties [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(374)
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(239)
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	1,091
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	2,458
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(1,128)
Commercial Portfolio Segment [Member] | Revolving Real Estate Secured By Family Properties-business [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	2
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	34
Commercial Portfolio Segment [Member] | Revolving Real Estate Secured By Family Properties-business [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	25
Commercial Portfolio Segment [Member] | Revolving Real Estate Secured By Family Properties-business [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	7
Commercial Portfolio Segment [Member] | Real Estate Secured By 1st Lein On Family Properties-Business [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(430)
Charge-offs	0
Recoveries	3
Allowance for loan losses, end of period	1,273
Commercial Portfolio Segment [Member] | Real Estate Secured By 1st Lein On Family Properties-Business [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	1,210
Commercial Portfolio Segment [Member] | Real Estate Secured By 1st Lein On Family Properties-Business [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	490
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	242
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	258
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	30
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(14)
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	755	346
Provision for (credit to) loan losses		43
Charge-offs		0
Recoveries		0
Allowance for loan losses, end of period		389
Commercial Portfolio Segment [Member] | Secured By Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	5,002	3,736
Provision for (credit to) loan losses		417
Charge-offs		0
Recoveries		0
Allowance for loan losses, end of period		4,153
Commercial Portfolio Segment [Member] | Secured By Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	1,240	871
Provision for (credit to) loan losses		270
Charge-offs		38
Recoveries		19
Allowance for loan losses, end of period		1,122
State and Political Subdivisions Portfolio Segment [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	94	89
Provision for (credit to) loan losses	(19)	(1)
Charge-offs	0	0
Recoveries	0	0
Allowance for loan losses, end of period	55	88
State and Political Subdivisions Portfolio Segment [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	94
State and Political Subdivisions Portfolio Segment [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(20)
Retail Portfolio Segment [Member] | Consumer Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	502	265
Provision for (credit to) loan losses		356
Charge-offs		(111)
Recoveries		34
Allowance for loan losses, end of period		544
Retail Portfolio Segment [Member] | Construction - Individual [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	0
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	1
Retail Portfolio Segment [Member] | Construction - Individual [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	1
Retail Portfolio Segment [Member] | Construction - Individual [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	0
Retail Portfolio Segment [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(43)
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	249
Retail Portfolio Segment [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	299
Retail Portfolio Segment [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(7)
Retail Portfolio Segment [Member] | Real Estate Secured By 1st Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(8)
Charge-offs	0
Recoveries	0
Allowance for loan losses, end of period	64
Retail Portfolio Segment [Member] | Real Estate Secured By 1st Lein on 1-4 Family Properties-Personal [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	57
Retail Portfolio Segment [Member] | Real Estate Secured By 1st Lein on 1-4 Family Properties-Personal [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	15
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lein On 1-4 Family Properties-Personal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(9)
Charge-offs	0
Recoveries	2
Allowance for loan losses, end of period	77
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lein On 1-4 Family Properties-Personal [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	55
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lein On 1-4 Family Properties-Personal [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	29
Retail Portfolio Segment [Member] | Student Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	(17)
Charge-offs	3
Recoveries	2
Allowance for loan losses, end of period	448
Retail Portfolio Segment [Member] | Student Loans [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	454
Retail Portfolio Segment [Member] | Student Loans [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	12
Retail Portfolio Segment [Member] | Overdrafts [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	31
Charge-offs	43
Recoveries	10
Allowance for loan losses, end of period	9
Retail Portfolio Segment [Member] | Overdrafts [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	8
Retail Portfolio Segment [Member] | Overdrafts [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	3
Retail Portfolio Segment [Member] | Other Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Provision for (credit to) loan losses	29
Charge-offs	32
Recoveries	0
Allowance for loan losses, end of period	30
Retail Portfolio Segment [Member] | Other Consumer [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	41
Retail Portfolio Segment [Member] | Other Consumer [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(8)
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	683	533
Provision for (credit to) loan losses	(81)	32
Charge-offs	0	0
Recoveries	0	0
Allowance for loan losses, end of period	405	565
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	682
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	(196)
Retail Portfolio Segment [Member] | Home Equity Loans And Lines [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	437	386
Provision for (credit to) loan losses		(22)
Charge-offs		12
Recoveries		6
Allowance for loan losses, end of period		358
Unallocated [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	502	550
Provision for (credit to) loan losses	0	21
Charge-offs		0
Recoveries		0
Allowance for loan losses, end of period	0	$ 571
Unallocated [Member] | Prior to adoption of ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	502
Unallocated [Member] | Impact of adopting ASC 326
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, beginning of period	$ (502)