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Note 4 - Loans and Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Allowance for Loan Losses Allocated	$ 854		$ 807
Unpaid principal balance	11,126		17,135
Recorded investment	11,126		17,135
Interest income recognized - with no allowance recorded		$ 84
Cash basis interest recognized - with no allowance recorded		84
Average impaired loans - with no allowance recorded		5,258
Average impaired loans	10,370	15,428
Interest income recognized	150	297
Cash basis interest recognized	150	297
Residential Portfolio Segment [Member]
Unpaid principal balance - with no allowance recorded	428		438
Recorded investment - with no allowance recorded	428		438
Average impaired loans - with allowance recorded		1,255
Interest income recognized - with no allowance recorded	4	4
Cash basis interest recognized - with no allowance recorded	4	4
Average impaired loans - with no allowance recorded	433	451
Interest income recognized - with allowance recorded		7
Cash basis interest recognized - with allowance recorded		7
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied [Member]
Unpaid principal balance - with allowance recorded	868		2,030
Recorded investment - with allowance recorded	868		2,030
Allowance for Loan Losses Allocated	409		385
Unpaid principal balance - with no allowance recorded	3,201		1,778
Recorded investment - with no allowance recorded	3,201		1,778
Average impaired loans - with allowance recorded	875	78
Interest income recognized - with no allowance recorded	9	52
Cash basis interest recognized - with no allowance recorded	9	52
Average impaired loans - with no allowance recorded		2,862
Interest income recognized - with allowance recorded		2
Cash basis interest recognized - with allowance recorded		2
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Nonowner Occupied [Member]
Unpaid principal balance - with no allowance recorded	1,019		7,492
Recorded investment - with no allowance recorded	1,019		7,492
Average impaired loans - with allowance recorded		360
Interest income recognized - with no allowance recorded		112
Cash basis interest recognized - with no allowance recorded		112
Average impaired loans - with no allowance recorded	1,033	4,177
Interest income recognized - with allowance recorded	11
Cash basis interest recognized - with allowance recorded	11
Commercial and Industrial Portfolio Segment [Member]
Unpaid principal balance - with allowance recorded	1,222		4,861
Recorded investment - with allowance recorded	1,222		4,861
Allowance for Loan Losses Allocated	445		303
Unpaid principal balance - with no allowance recorded	3,985		49
Recorded investment - with no allowance recorded	3,985		49
Average impaired loans - with allowance recorded	611	984
Interest income recognized - with no allowance recorded	7
Cash basis interest recognized - with no allowance recorded	7
Average impaired loans - with no allowance recorded	4,279
Interest income recognized - with allowance recorded	66	36
Cash basis interest recognized - with allowance recorded	66	36
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Unpaid principal balance - with allowance recorded			8
Recorded investment - with allowance recorded			8
Allowance for Loan Losses Allocated			8
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Unpaid principal balance - with allowance recorded			111
Recorded investment - with allowance recorded			111
Allowance for Loan Losses Allocated			111
Interest income recognized - with no allowance recorded	48
Cash basis interest recognized - with no allowance recorded	48
Average impaired loans - with no allowance recorded	2,754
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Unpaid principal balance - with no allowance recorded	403		368
Recorded investment - with no allowance recorded	403		$ 368
Average impaired loans - with allowance recorded		3
Interest income recognized - with no allowance recorded	5
Cash basis interest recognized - with no allowance recorded	5
Average impaired loans - with no allowance recorded	$ 385
Interest income recognized - with allowance recorded

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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