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Note 7 - Loans Receivable and Credit Disclosures - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Balance	$ 16,621	$ 17,215
Provision (credit) for loan losses	(127)	(426)
Recoveries of loans charged-off	3	269
Loans charged-off	(13)	(151)
Balance	16,484	16,907
Construction Real Estate [Member]
Balance	675	725
Provision (credit) for loan losses	(30)	143
Recoveries of loans charged-off	0	0
Loans charged-off	0	0
Balance	645	868
Family Residential Real Estate 1-4 [Member]
Balance	2,752	2,581
Provision (credit) for loan losses	150	(431)
Recoveries of loans charged-off	1	263
Loans charged-off	(4)	(30)
Balance	2,899	2,383
Commercial Real Estate Portfolio Segment [Member]
Balance	8,406	8,930
Provision (credit) for loan losses	(92)	118
Recoveries of loans charged-off	0	1
Loans charged-off	0	0
Balance	8,314	9,049
Agriculture Real Estate [Member]
Balance	1,584	1,595
Provision (credit) for loan losses	46	(97)
Recoveries of loans charged-off	0	0
Loans charged-off	0	0
Balance	1,630	1,498
Commercial Portfolio Segment [Member]
Balance	1,170	1,453
Provision (credit) for loan losses	(19)	(79)
Recoveries of loans charged-off	1	1
Loans charged-off	0	(113)
Balance	1,152	1,262
Agriculture [Member]
Balance	1,836	1,696
Provision (credit) for loan losses	(230)	(82)
Recoveries of loans charged-off	0	0
Loans charged-off	0	0
Balance	1,606	1,614
Consumer and Other [Member]
Balance	198	235
Provision (credit) for loan losses	48	2
Recoveries of loans charged-off	1	4
Loans charged-off	(9)	(8)
Balance	$ 238	$ 233

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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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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- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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