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Note 4 - Loans and the Allowance for Credit Losses (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Deferred Loan Origination Costs	$ 951,000	$ 599,000	$ 2,173,000	$ 2,062,000
Real Estate Acquired Through Foreclosure	$ 114,000		$ 114,000		$ 91,000
Financing Receivable, Modified, Subsequent Default, Payments				1,300,000
Real Estate Loan [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate [Member]
Number of Mortgage Loans in Process of Foreclosure	1		1
Mortgage Loans in Process of Foreclosure, Amount	$ 221,000		$ 221,000
Real Estate Loan [Member] | Residential Portfolio Segment [Member]
Number of Mortgage Loans in Process of Foreclosure	2		2
Mortgage Loans in Process of Foreclosure, Amount	$ 185,000		$ 185,000
Agricultural Loans [Member]
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default			$ 9,100,000	$ 4,800,000
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Period Past Due (Day)				46 days
Agricultural Loans [Member] | Commercial Portfolio Segment [Member] | SFR Property and Agricultural Land [Member]
Number of Mortgage Loans in Process of Foreclosure	2		2
Mortgage Loans in Process of Foreclosure, Amount	$ 2,337,000		$ 2,337,000
Equity Lines of Credit [Member] | Residential Portfolio Segment [Member] | SFR Property [Member]
Number of Mortgage Loans in Process of Foreclosure	1		1
Mortgage Loans in Process of Foreclosure, Amount	$ 79,000		$ 79,000
Commercial Loans [Member]
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default				$ 32,000
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Number of Loans				1
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Period Past Due (Day)				70 days
Commercial Loans [Member] | Commercial Portfolio Segment [Member] | SFR Property [Member]
Number of Mortgage Loans in Process of Foreclosure					1
Mortgage Loans in Process of Foreclosure, Amount					$ 53,000
Agricultural Loans 1 [Member]
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default			$ 4,900,000
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Number of Loans			4
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Period Past Due (Day)			107 days
Agricultural Loans 2 [Member]
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default			$ 2,000,000
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Number of Loans			1
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Period Past Due (Day)			168 days
Agricultural Loans 3 [Member]
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default			$ 2,200,000
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Number of Loans			1
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Period Past Due (Day)			15 days
Other Real Estate, Residential Real Estate [Member]
Number of Real Estate Properties	2		2		1

X

- Definition

This item represents loan origination costs that have been deferred.

+ References

No definition available.

+ Details

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- Definition

Number of loans, excluding accrued interest, of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

+ References

No definition available.

+ Details

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- Definition

Period past due of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

+ References

No definition available.

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- Definition

Payments on financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

+ References

No definition available.

+ Details

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- Definition

The number of mortgage loans in process of foreclosure.

+ References

No definition available.

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- Definition

Amortized cost excluding accrued interest, of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 44
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-44

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- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 35
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-35

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

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- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-Section 50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11

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