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Note 3 - Loans and Allowance for Loan Losses - Aging Analysis of Loans by Loan Category (Details) - USD ($) $ in Thousands		Jun. 30, 2022		Dec. 31, 2021	Jun. 30, 2021
Loans		$ 1,081,389		$ 1,016,848	$ 1,004,587
Loan 90 days and accruing		0		0
Agricultural [Member]
Loans		59,063		64,819	46,567
Loan 90 days and accruing		0		0
Commercial and Industrial [Member]
Loans		208,857		203,024	265,032
Loan 90 days and accruing		0		0
Consumer Portfolio Segment [Member]
Loans		38,376		35,174	33,370
Loan 90 days and accruing		0		0
Commercial Real Estate Portfolio Segment [Member]
Loans		565,163		525,884	473,987
Loan 90 days and accruing		0		0
Construction Real Estate [Member]
Loans		17,950		19,066	15,440
Loan 90 days and accruing		0		0
Residential Portfolio Segment [Member]
Loans		191,980		168,881	$ 170,191
Loan 90 days and accruing		0		0
Financial Asset, 30 to 59 Days Past Due [Member]
Loans		171	[1]	3,151
Financial Asset, 30 to 59 Days Past Due [Member] | Agricultural [Member]
Loans	[1]	0		0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member]
Loans	[1]	142		21
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	[1]	0		70
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	0		422
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Real Estate [Member]
Loans	[1]	0		1,149
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member]
Loans	[1]	29		1,489
Financial Asset, 60 to 89 Days Past Due [Member]
Loans		197	[1]	1,569
Financial Asset, 60 to 89 Days Past Due [Member] | Agricultural [Member]
Loans	[1]	0		0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member]
Loans	[1]	0		0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	[1]	0		15
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	0		13
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Real Estate [Member]
Loans	[1]	0		1,235
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member]
Loans	[1]	197		306
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		673	[1]	821
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agricultural [Member]
Loans	[1]	0		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial [Member]
Loans	[1]	93		88
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	[1]	0		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	0		279
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Real Estate [Member]
Loans	[1]	0		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Portfolio Segment [Member]
Loans	[1]	580		454
Financial Asset, Past Due [Member]
Loans		1,041	[1]	5,541
Financial Asset, Past Due [Member] | Agricultural [Member]
Loans	[1]	0		0
Financial Asset, Past Due [Member] | Commercial and Industrial [Member]
Loans	[1]	235		109
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	[1]	0		85
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	0		714
Financial Asset, Past Due [Member] | Construction Real Estate [Member]
Loans	[1]	0		2,384
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member]
Loans	[1]	806		2,249
Financial Asset, Not Past Due [Member]
Loans		1,080,348		1,011,307
Financial Asset, Not Past Due [Member] | Agricultural [Member]
Loans		59,063		64,819
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member]
Loans		208,622		202,915
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member]
Loans		38,376		35,089
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans		565,163		525,170
Financial Asset, Not Past Due [Member] | Construction Real Estate [Member]
Loans		17,950		16,682
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member]
Loans		$ 191,174		$ 166,632
[1] Includes nonaccrual loans.

X

- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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