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Note 7 - Loans Receivable and Credit Disclosures - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance	$ 16,420	$ 16,893	$ 16,621	$ 17,215
Provision (credit) for loan losses	(520)	(94)	(706)	(540)
Recoveries of loans charged-off	6	47	17	329
Loans charged-off	(9)	(16)	(35)	(174)
Balance	15,897	16,830	15,897	16,830
Construction Real Estate [Member]
Balance	606	738	675	725
Provision (credit) for loan losses	(2)	(156)	(71)	(143)
Recoveries of loans charged-off	0	0	0	0
Loans charged-off	0	0	0	0
Balance	604	582	604	582
Family Residential Real Estate 1-4 [Member]
Balance	2,920	2,603	2,752	2,581
Provision (credit) for loan losses	83	59	257	(155)
Recoveries of loans charged-off	4	1	8	267
Loans charged-off	0	(4)	(10)	(34)
Balance	3,007	2,659	3,007	2,659
Commercial Real Estate Portfolio Segment [Member]
Balance	8,360	8,889	8,406	8,930
Provision (credit) for loan losses	(492)	33	(539)	(10)
Recoveries of loans charged-off	1	1	2	3
Loans charged-off	0	0	0	0
Balance	7,869	8,923	7,869	8,923
Agriculture Real Estate [Member]
Balance	1,692	1,614	1,584	1,595
Provision (credit) for loan losses	(94)	(36)	14	(17)
Recoveries of loans charged-off	0	0	0	0
Loans charged-off	0	0	0	0
Balance	1,598	1,578	1,598	1,578
Commercial Portfolio Segment [Member]
Balance	1,125	1,140	1,170	1,453
Provision (credit) for loan losses	(25)	64	(72)	(138)
Recoveries of loans charged-off	1	1	3	3
Loans charged-off	(2)	0	(2)	(113)
Balance	1,099	1,205	1,099	1,205
Agriculture [Member]
Balance	1,484	1,675	1,836	1,696
Provision (credit) for loan losses	24	(59)	(328)	(85)
Recoveries of loans charged-off	0	43	0	48
Loans charged-off	(7)	0	(7)	0
Balance	1,501	1,659	1,501	1,659
Consumer and Other [Member]
Balance	233	234	198	235
Provision (credit) for loan losses	(14)	1	33	8
Recoveries of loans charged-off	0	1	4	8
Loans charged-off	0	(12)	(16)	(27)
Balance	$ 219	$ 224	$ 219	$ 224

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

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-Publisher FASB
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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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-Topic 310
-SubTopic 10
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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

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-Publisher FASB
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-Topic 230
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