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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans by Loan Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Recorded Investment with no related allowance recorded	$ 406		$ 572
Unpaid Principal Balance with no related allowance recorded	551		694
Recorded Investment with an allowance recorded	4,534		4,861
Unpaid Principal Balance with an allowance recorded	4,603		4,943
Related Allowance	547		503
Recorded Investment	4,940		5,433
Unpaid Principal Balance	5,154		5,637
Average Recorded Investment with no related allowance recorded	489	$ 4,282
Interest Income Recognized with no related allowance recorded	1	4
Average Recorded Investment with an allowance recorded	4,697	4,838
Interest Income Recognized with an allowance recorded	64	21
Average Recorded Investment	5,186	9,120
Interest Income Recognized	65	25
Agricultural [Member]
Recorded Investment with no related allowance recorded	314		314
Unpaid Principal Balance with no related allowance recorded	428		428
Recorded Investment with an allowance recorded	2,228		2,302
Unpaid Principal Balance with an allowance recorded	2,228		2,302
Related Allowance	253		251
Recorded Investment	2,542		2,616
Unpaid Principal Balance	2,656		2,730
Average Recorded Investment with no related allowance recorded	314	348
Interest Income Recognized with no related allowance recorded	0	0
Average Recorded Investment with an allowance recorded	2,265	1,413
Interest Income Recognized with an allowance recorded	42	0
Average Recorded Investment	2,579	1,761
Interest Income Recognized	42	0
Commercial and Industrial [Member]
Recorded Investment with no related allowance recorded	92		0
Unpaid Principal Balance with no related allowance recorded	123		0
Recorded Investment with an allowance recorded	264		339
Unpaid Principal Balance with an allowance recorded	279		363
Related Allowance	116		95
Recorded Investment	356		339
Unpaid Principal Balance	402		363
Average Recorded Investment with no related allowance recorded	46	1,490
Interest Income Recognized with no related allowance recorded	1	0
Average Recorded Investment with an allowance recorded	301	155
Interest Income Recognized with an allowance recorded	2	0
Average Recorded Investment	347	1,645
Interest Income Recognized	3	0
Consumer Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	0		0
Unpaid Principal Balance with no related allowance recorded	0		0
Recorded Investment with an allowance recorded	32		14
Unpaid Principal Balance with an allowance recorded	32		15
Related Allowance	3		2
Recorded Investment	32		14
Unpaid Principal Balance	32		15
Average Recorded Investment with no related allowance recorded	0	0
Interest Income Recognized with no related allowance recorded	0	0
Average Recorded Investment with an allowance recorded	23	4
Interest Income Recognized with an allowance recorded	0	0
Average Recorded Investment	23	4
Interest Income Recognized	0	0
Construction Real Estate [Member]
Recorded Investment with no related allowance recorded	0		0
Unpaid Principal Balance with no related allowance recorded	0		0
Recorded Investment with an allowance recorded	0		0
Unpaid Principal Balance with an allowance recorded	0		0
Related Allowance	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Average Recorded Investment with no related allowance recorded	0	40
Interest Income Recognized with no related allowance recorded	0	0
Average Recorded Investment with an allowance recorded	0	0
Interest Income Recognized with an allowance recorded	0	0
Average Recorded Investment	0	40
Interest Income Recognized	0	0
Commercial Real Estate Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	0		94
Unpaid Principal Balance with no related allowance recorded	0		94
Recorded Investment with an allowance recorded	157		179
Unpaid Principal Balance with an allowance recorded	157		179
Related Allowance	8		9
Recorded Investment	157		273
Unpaid Principal Balance	157		273
Average Recorded Investment with no related allowance recorded	47	2,238
Interest Income Recognized with no related allowance recorded	0	3
Average Recorded Investment with an allowance recorded	168	778
Interest Income Recognized with an allowance recorded	3	4
Average Recorded Investment	215	3,016
Interest Income Recognized	3	7
Residential Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	0		164
Unpaid Principal Balance with no related allowance recorded	0		172
Recorded Investment with an allowance recorded	1,853		2,027
Unpaid Principal Balance with an allowance recorded	1,907		2,084
Related Allowance	167		146
Recorded Investment	1,853		2,191
Unpaid Principal Balance	1,907		$ 2,256
Average Recorded Investment with no related allowance recorded	82	166
Interest Income Recognized with no related allowance recorded	0	1
Average Recorded Investment with an allowance recorded	1,940	2,488
Interest Income Recognized with an allowance recorded	17	17
Average Recorded Investment	2,022	2,654
Interest Income Recognized	$ 17	$ 18

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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-SubTopic 10
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