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Note 7 - Loans Receivable and Credit Disclosures - Composition of Loans Receivable (Details) - USD ($) $ in Thousands		Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Loans receivable		$ 1,156,678		$ 1,160,667
Allowance for loan losses		(16,420)	$ (16,484)	(16,621)	$ (16,893)	$ (16,907)	$ (17,215)
Deferred loan (fees) and costs, net		351		62
Loans receivable, net		1,140,609		1,144,108
Construction Real Estate [Member]
Loans receivable		41,151		42,638
Allowance for loan losses		(606)	(645)	(675)	(738)	(868)	(725)
Family Residential Real Estate 1-4 [Member]
Loans receivable		261,690		246,745
Allowance for loan losses		(2,920)	(2,899)	(2,752)	(2,603)	(2,383)	(2,581)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable		515,250		515,367
Allowance for loan losses		(8,360)	(8,314)	(8,406)	(8,889)	(9,049)	(8,930)
Agriculture Real Estate [Member]
Loans receivable		158,897		153,457
Allowance for loan losses		(1,692)	(1,630)	(1,584)	(1,614)	(1,498)	(1,595)
Commercial Portfolio Segment [Member]
Loans receivable	[1]	72,065		75,482
Allowance for loan losses		(1,125)	(1,152)	(1,170)	(1,140)	(1,262)	(1,453)
Agriculture [Member]
Loans receivable		91,929		111,881
Allowance for loan losses		(1,484)	(1,606)	(1,836)	(1,675)	(1,614)	(1,696)
Consumer and Other [Member]
Loans receivable		15,696		15,097
Allowance for loan losses		$ (233)	$ (238)	$ (198)	$ (234)	$ (233)	$ (235)
[1] Commercial loan portfolio includes $0.3 million and $6.0 million of Paycheck Protection Program ("PPP") loans as of March 31, 2022 and December 31, 2021, respectively.

X

- 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.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount after allowance and 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 and loans held for sale.

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