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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans by Loan Category (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Recorded Investment with no related allowance recorded	$ 572	$ 3,958	$ 2,728
Unpaid Principal Balance with no related allowance recorded	694	4,969	3,398
Average Recorded Investment with no related allowance recorded	2,555	2,404	1,165
Interest Income Recognized with no related allowance recorded	5	19	53
Recorded Investment with an allowance recorded	4,861	3,893	3,194
Unpaid Principal Balance with an allowance recorded	4,943	3,986	3,323
Related Allowance	503	431	355
Average Recorded Investment with an allowance recorded	4,736	3,506	3,983
Interest Income Recognized with an allowance recorded	218	134	116
Recorded Investment	5,433	7,851	5,922
Unpaid Principal Balance	5,637	8,955	6,721
Average Recorded Investment	7,291	5,910	5,148
Interest Income Recognized with an allowance recorded	223	153	169
Agricultural [Member]
Recorded Investment with no related allowance recorded	314	348	545
Unpaid Principal Balance with no related allowance recorded	428	434	545
Average Recorded Investment with no related allowance recorded	598	329	146
Interest Income Recognized with no related allowance recorded	0	0	10
Recorded Investment with an allowance recorded	2,302	0	379
Unpaid Principal Balance with an allowance recorded	2,302	0	439
Related Allowance	251	0	103
Average Recorded Investment with an allowance recorded	1,873	152	388
Interest Income Recognized with an allowance recorded	139	0	0
Recorded Investment	2,616	348	924
Unpaid Principal Balance	2,730	434	984
Average Recorded Investment	2,471	481	534
Interest Income Recognized with an allowance recorded	139	0	10
Commercial and Industrial [Member]
Recorded Investment with no related allowance recorded	0	1,516	259
Unpaid Principal Balance with no related allowance recorded	0	1,629	340
Average Recorded Investment with no related allowance recorded	596	464	104
Interest Income Recognized with no related allowance recorded	0	2	9
Recorded Investment with an allowance recorded	339	147	0
Unpaid Principal Balance with an allowance recorded	363	147	0
Related Allowance	95	19	0
Average Recorded Investment with an allowance recorded	226	111	86
Interest Income Recognized with an allowance recorded	5	12	1
Recorded Investment	339	1,663	259
Unpaid Principal Balance	363	1,776	340
Average Recorded Investment	822	575	190
Interest Income Recognized with an allowance recorded	5	14	10
Consumer Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	0	0	0
Unpaid Principal Balance with no related allowance recorded	0	0	0
Average Recorded Investment with no related allowance recorded	0	1	0
Interest Income Recognized with no related allowance recorded	0	0	0
Recorded Investment with an allowance recorded	14	8	17
Unpaid Principal Balance with an allowance recorded	15	8	18
Related Allowance	2	1	4
Average Recorded Investment with an allowance recorded	4	16	48
Interest Income Recognized with an allowance recorded	0	0	0
Recorded Investment	14	8	17
Unpaid Principal Balance	15	8	18
Average Recorded Investment	4	17	48
Interest Income Recognized with an allowance recorded	0	0	0
Construction Real Estate [Member]
Recorded Investment with no related allowance recorded	0	80	0
Unpaid Principal Balance with no related allowance recorded	0	80	0
Average Recorded Investment with no related allowance recorded	16	16	0
Interest Income Recognized with no related allowance recorded	0	0	0
Recorded Investment with an allowance recorded	0	0	0
Unpaid Principal Balance with an allowance recorded	0	0	0
Related Allowance	0	0	0
Average Recorded Investment with an allowance recorded	0	0	0
Interest Income Recognized with an allowance recorded	0	0	0
Recorded Investment	0	80	0
Unpaid Principal Balance	0	80	0
Average Recorded Investment	16	16	0
Interest Income Recognized with an allowance recorded	0	0	0
Commercial Real Estate Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	94	1,852	1,882
Unpaid Principal Balance with no related allowance recorded	94	2,664	2,471
Average Recorded Investment with no related allowance recorded	1,117	1,495	782
Interest Income Recognized with no related allowance recorded	5	14	30
Recorded Investment with an allowance recorded	179	1,180	406
Unpaid Principal Balance with an allowance recorded	179	1,180	406
Related Allowance	9	157	13
Average Recorded Investment with an allowance recorded	456	897	975
Interest Income Recognized with an allowance recorded	10	35	32
Recorded Investment	273	3,032	2,288
Unpaid Principal Balance	273	3,844	2,877
Average Recorded Investment	1,573	2,392	1,757
Interest Income Recognized with an allowance recorded	15	49	62
Residential Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	164	162	42
Unpaid Principal Balance with no related allowance recorded	172	162	42
Average Recorded Investment with no related allowance recorded	228	99	133
Interest Income Recognized with no related allowance recorded	0	3	4
Recorded Investment with an allowance recorded	2,027	2,558	2,392
Unpaid Principal Balance with an allowance recorded	2,084	2,651	2,460
Related Allowance	146	254	235
Average Recorded Investment with an allowance recorded	2,177	2,330	2,486
Interest Income Recognized with an allowance recorded	64	87	83
Recorded Investment	2,191	2,720	2,434
Unpaid Principal Balance	2,256	2,813	2,502
Average Recorded Investment	2,405	2,429	2,619
Interest Income Recognized with an allowance recorded	$ 64	$ 90	$ 87

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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