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Note 4 - Loans Receivable and Credit Disclosures - Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Impaired financing receivable with no related allowance, recorded investment	$ 1,908	$ 3,148
Impaired financing receivable with no related allowance, unpaid principal balance	2,680	3,788
Loans with no specific reserve recorded, average recorded investment	2,435	10,442
Loans with no specific reserve recorded, interest income recognized	356	517
Impaired financing receivable with related allowance, recorded investment	10,404	12,125
Impaired financing receivable with related allowance, unpaid principal balance	10,751	13,205
Impaired financing receivable, related allowance	1,392	1,819
Loans with an allowance recorded, average recorded investment	10,805	3,970
Loans with an allowance recorded, interest income recognized	0	158
Impaired financing receivable, recorded investment	12,312	15,273
Impaired financing receivable, unpaid principal balance	13,431	16,993
Loans, average recorded investment	13,240	14,412
Loans, interest income recognized	356	675
Construction Real Estate [Member]
Impaired financing receivable with no related allowance, recorded investment	0	167
Impaired financing receivable with no related allowance, unpaid principal balance	0	167
Loans with no specific reserve recorded, average recorded investment	67	66
Loans with no specific reserve recorded, interest income recognized	0	0
Impaired financing receivable with related allowance, recorded investment	0	0
Impaired financing receivable with related allowance, unpaid principal balance	0	0
Impaired financing receivable, related allowance	0	0
Loans with an allowance recorded, average recorded investment	0	0
Loans with an allowance recorded, interest income recognized	0	0
Impaired financing receivable, recorded investment	0	167
Impaired financing receivable, unpaid principal balance	0	167
Loans, average recorded investment	67	66
Loans, interest income recognized	0	0
Family Residential Real Estate 1-4 [Member]
Impaired financing receivable with no related allowance, recorded investment	677	416
Impaired financing receivable with no related allowance, unpaid principal balance	739	475
Loans with no specific reserve recorded, average recorded investment	605	318
Loans with no specific reserve recorded, interest income recognized	19	0
Impaired financing receivable with related allowance, recorded investment	303	924
Impaired financing receivable with related allowance, unpaid principal balance	314	1,278
Impaired financing receivable, related allowance	40	150
Loans with an allowance recorded, average recorded investment	329	935
Loans with an allowance recorded, interest income recognized	0	66
Impaired financing receivable, recorded investment	980	1,340
Impaired financing receivable, unpaid principal balance	1,053	1,753
Loans, average recorded investment	934	1,253
Loans, interest income recognized	19	66
Commercial Real Estate Portfolio Segment [Member]
Impaired financing receivable with no related allowance, recorded investment	124	242
Impaired financing receivable with no related allowance, unpaid principal balance	142	578
Loans with no specific reserve recorded, average recorded investment	154	6,625
Loans with no specific reserve recorded, interest income recognized	297	16
Impaired financing receivable with related allowance, recorded investment	9,668	10,016
Impaired financing receivable with related allowance, unpaid principal balance	10,001	10,157
Impaired financing receivable, related allowance	1,139	1,486
Loans with an allowance recorded, average recorded investment	9,909	2,198
Loans with an allowance recorded, interest income recognized	0	0
Impaired financing receivable, recorded investment	9,792	10,258
Impaired financing receivable, unpaid principal balance	10,143	10,735
Loans, average recorded investment	10,063	8,823
Loans, interest income recognized	297	16
Agriculture Real Estate [Member]
Impaired financing receivable with no related allowance, recorded investment	546	1,664
Impaired financing receivable with no related allowance, unpaid principal balance	1,001	1,698
Loans with no specific reserve recorded, average recorded investment	901	1,295
Loans with no specific reserve recorded, interest income recognized	25	6
Impaired financing receivable with related allowance, recorded investment	0	0
Impaired financing receivable with related allowance, unpaid principal balance	0	0
Impaired financing receivable, related allowance	0	0
Loans with an allowance recorded, average recorded investment	0	0
Loans with an allowance recorded, interest income recognized	0	0
Impaired financing receivable, recorded investment	546	1,664
Impaired financing receivable, unpaid principal balance	1,001	1,698
Loans, average recorded investment	901	1,295
Loans, interest income recognized	25	6
Commercial Portfolio Segment [Member]
Impaired financing receivable with no related allowance, recorded investment	233	274
Impaired financing receivable with no related allowance, unpaid principal balance	269	318
Loans with no specific reserve recorded, average recorded investment	367	524
Loans with no specific reserve recorded, interest income recognized	0	23
Impaired financing receivable with related allowance, recorded investment	97	666
Impaired financing receivable with related allowance, unpaid principal balance	98	1,247
Impaired financing receivable, related allowance	60	115
Loans with an allowance recorded, average recorded investment	164	418
Loans with an allowance recorded, interest income recognized	0	0
Impaired financing receivable, recorded investment	330	940
Impaired financing receivable, unpaid principal balance	367	1,565
Loans, average recorded investment	531	942
Loans, interest income recognized	0	23
Agriculture [Member]
Impaired financing receivable with no related allowance, recorded investment	322	377
Impaired financing receivable with no related allowance, unpaid principal balance	521	542
Loans with no specific reserve recorded, average recorded investment	335	1,592
Loans with no specific reserve recorded, interest income recognized	15	344
Impaired financing receivable with related allowance, recorded investment	315	482
Impaired financing receivable with related allowance, unpaid principal balance	315	484
Impaired financing receivable, related allowance	132	40
Loans with an allowance recorded, average recorded investment	371	400
Loans with an allowance recorded, interest income recognized	0	0
Impaired financing receivable, recorded investment	637	859
Impaired financing receivable, unpaid principal balance	836	1,026
Loans, average recorded investment	706	1,992
Loans, interest income recognized	15	344
Consumer and Other [Member]
Impaired financing receivable with no related allowance, recorded investment	6	8
Impaired financing receivable with no related allowance, unpaid principal balance	8	10
Loans with no specific reserve recorded, average recorded investment	6	22
Loans with no specific reserve recorded, interest income recognized	0	128
Impaired financing receivable with related allowance, recorded investment	21	37
Impaired financing receivable with related allowance, unpaid principal balance	23	39
Impaired financing receivable, related allowance	21	28
Loans with an allowance recorded, average recorded investment	32	19
Loans with an allowance recorded, interest income recognized	0	92
Impaired financing receivable, recorded investment	27	45
Impaired financing receivable, unpaid principal balance	31	49
Loans, average recorded investment	38	41
Loans, interest income recognized	$ 0	$ 220

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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