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Note 7 - Loans Receivable and Credit Disclosures - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Loan and lease receivable other than consumer and residential	$ 879,292	$ 898,825
Pass [Member]
Loan and lease receivable other than consumer and residential	717,913	704,686
Watch [Member]
Loan and lease receivable other than consumer and residential	118,288	132,772
Special Mention [Member]
Loan and lease receivable other than consumer and residential	0	15,030
Substandard [Member]
Loan and lease receivable other than consumer and residential	32,636	35,032
Substandard Impaired [Member]
Loan and lease receivable other than consumer and residential	10,455	11,305
Construction Real Estate [Member]
Loan and lease receivable other than consumer and residential	41,151	42,638
Construction Real Estate [Member] | Pass [Member]
Loan and lease receivable other than consumer and residential	40,919	38,753
Construction Real Estate [Member] | Watch [Member]
Loan and lease receivable other than consumer and residential	232	239
Construction Real Estate [Member] | Special Mention [Member]
Loan and lease receivable other than consumer and residential	0	0
Construction Real Estate [Member] | Substandard [Member]
Loan and lease receivable other than consumer and residential	0	3,646
Construction Real Estate [Member] | Substandard Impaired [Member]
Loan and lease receivable other than consumer and residential	0	0
Commercial Real Estate Portfolio Segment [Member]
Loan and lease receivable other than consumer and residential	515,250	515,367
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loan and lease receivable other than consumer and residential	404,173	381,346
Commercial Real Estate Portfolio Segment [Member] | Watch [Member]
Loan and lease receivable other than consumer and residential	75,812	99,127
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loan and lease receivable other than consumer and residential	0	3,085
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loan and lease receivable other than consumer and residential	25,552	22,017
Commercial Real Estate Portfolio Segment [Member] | Substandard Impaired [Member]
Loan and lease receivable other than consumer and residential	9,713	9,792
Agriculture Real Estate [Member]
Loan and lease receivable other than consumer and residential	158,897	153,457
Agriculture Real Estate [Member] | Pass [Member]
Loan and lease receivable other than consumer and residential	134,190	126,157
Agriculture Real Estate [Member] | Watch [Member]
Loan and lease receivable other than consumer and residential	19,471	17,853
Agriculture Real Estate [Member] | Special Mention [Member]
Loan and lease receivable other than consumer and residential	0	3,519
Agriculture Real Estate [Member] | Substandard [Member]
Loan and lease receivable other than consumer and residential	5,065	5,382
Agriculture Real Estate [Member] | Substandard Impaired [Member]
Loan and lease receivable other than consumer and residential	171	546
Commercial Portfolio Segment [Member]
Loan and lease receivable other than consumer and residential	72,065	75,482
Commercial Portfolio Segment [Member] | Pass [Member]
Loan and lease receivable other than consumer and residential	62,805	63,141
Commercial Portfolio Segment [Member] | Watch [Member]
Loan and lease receivable other than consumer and residential	7,520	8,132
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loan and lease receivable other than consumer and residential	0	762
Commercial Portfolio Segment [Member] | Substandard [Member]
Loan and lease receivable other than consumer and residential	1,499	3,117
Commercial Portfolio Segment [Member] | Substandard Impaired [Member]
Loan and lease receivable other than consumer and residential	241	330
Agriculture [Member]
Loan and lease receivable other than consumer and residential	91,929	111,881
Agriculture [Member] | Pass [Member]
Loan and lease receivable other than consumer and residential	75,826	95,289
Agriculture [Member] | Watch [Member]
Loan and lease receivable other than consumer and residential	15,253	7,421
Agriculture [Member] | Special Mention [Member]
Loan and lease receivable other than consumer and residential	0	7,664
Agriculture [Member] | Substandard [Member]
Loan and lease receivable other than consumer and residential	520	870
Agriculture [Member] | Substandard Impaired [Member]
Loan and lease receivable other than consumer and residential	$ 330	$ 637

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