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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans by Loan Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Recorded Investment with no related allowance recorded	$ 401		$ 401		$ 2,728
Unpaid Principal Balance with no related allowance recorded	465		465		3,398
Recorded Investment with an allowance recorded	4,895		4,895		3,194
Unpaid Principal Balance with an allowance recorded	5,656		5,656		3,323
Related Allowance	497		497		355
Recorded Investment	5,296		5,296		5,922
Unpaid Principal Balance	6,121		6,121		6,721
Average Recorded Investment with no related allowance recorded	1,309	$ 1,842	1,782	$ 285
Interest Income Recognized with no related allowance recorded	0	63	0	139
Average Recorded Investment with an allowance recorded	4,027	4,039	3,749	4,433
Interest Income Recognized with an allowance recorded	27	0	64	0
Average Recorded Investment	5,336	5,881	5,531	4,718
Interest Income Recognized	27	63	64	139
Agricultural [Member]
Recorded Investment with no related allowance recorded	379		379		545
Unpaid Principal Balance with no related allowance recorded	440		440		545
Recorded Investment with an allowance recorded	0		0		379
Unpaid Principal Balance with an allowance recorded	0		0		439
Related Allowance	0		0		103
Recorded Investment	379		379		924
Unpaid Principal Balance	440		440		984
Average Recorded Investment with no related allowance recorded	190	0	308	62
Interest Income Recognized with no related allowance recorded	0	0	0	0
Average Recorded Investment with an allowance recorded	190	389	253	390
Interest Income Recognized with an allowance recorded	0	0	0	0
Average Recorded Investment	380	389	561	452
Interest Income Recognized	0	0	0	0
Commercial and Industrial [Member]
Recorded Investment with no related allowance recorded	0		0		259
Unpaid Principal Balance with no related allowance recorded	0		0		340
Recorded Investment with an allowance recorded	321		321		0
Unpaid Principal Balance with an allowance recorded	404		404		0
Related Allowance	31		31		0
Recorded Investment	321		321		259
Unpaid Principal Balance	404		404		340
Average Recorded Investment with no related allowance recorded	129	0	173	0
Interest Income Recognized with no related allowance recorded	0	6	0	10
Average Recorded Investment with an allowance recorded	167	193	116	136
Interest Income Recognized with an allowance recorded	0	0	0	0
Average Recorded Investment	296	193	289	136
Interest Income Recognized	0	6	0	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
Recorded Investment with an allowance recorded	24		24		17
Unpaid Principal Balance with an allowance recorded	24		24		18
Related Allowance	6		6		4
Recorded Investment	24		24		18
Unpaid Principal Balance	24		24		18
Average Recorded Investment with no related allowance recorded	0	0	0	0
Interest Income Recognized with no related allowance recorded	0	0	0	0
Average Recorded Investment with an allowance recorded	19	58	19	69
Interest Income Recognized with an allowance recorded	0	0	0	0
Average Recorded Investment	19	59	19	70
Interest Income Recognized	0	0	0	0
Construction Real Estate [Member]
Recorded Investment with no related allowance recorded	0		0		0
Unpaid Principal Balance 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
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Average Recorded Investment with no related allowance recorded	0	0	0	0
Interest Income Recognized with no related allowance recorded	0	0	0	0
Average Recorded Investment with an allowance recorded	0	0	0	0
Interest Income Recognized with an allowance recorded	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
Commercial Real Estate Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	0		0		1,882
Unpaid Principal Balance with no related allowance recorded	0		0		2,471
Recorded Investment with an allowance recorded	2,246		2,246		406
Unpaid Principal Balance with an allowance recorded	2,836		2,836		406
Related Allowance	235		235		13
Recorded Investment	2,246		2,246		2,287
Unpaid Principal Balance	2,836		2,836		2,877
Average Recorded Investment with no related allowance recorded	941	506	1,255	49
Interest Income Recognized with no related allowance recorded	0	32	0	75
Average Recorded Investment with an allowance recorded	1,312	882	1,005	1,340
Interest Income Recognized with an allowance recorded	5	0	12	0
Average Recorded Investment	2,253	1,387	2,260	1,388
Interest Income Recognized	5	32	12	75
Residential Portfolio Segment [Member]
Recorded Investment with no related allowance recorded	22		22		42
Unpaid Principal Balance with no related allowance recorded	25		25		42
Recorded Investment with an allowance recorded	2,304		2,304		2,392
Unpaid Principal Balance with an allowance recorded	2,392		2,392		2,460
Related Allowance	225		225		235
Recorded Investment	2,326		2,326		2,434
Unpaid Principal Balance	2,417		2,417		$ 2,502
Average Recorded Investment with no related allowance recorded	49	1,336	46	174
Interest Income Recognized with no related allowance recorded	0	25	0	54
Average Recorded Investment with an allowance recorded	2,339	2,517	2,356	2,498
Interest Income Recognized with an allowance recorded	22	0	52	0
Average Recorded Investment	2,388	3,853	2,402	2,672
Interest Income Recognized	$ 22	$ 25	$ 52	$ 54

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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