Note 4 - Loans and Allowance for Loan Losses - Impaired Loans (Details) $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($)
Average recorded investment with no allowance	$ 1,838
Interest income recognized with no allowance	45
Average recorded investment with allowance	214
Interest income recognized with allowance	0
Average recorded investment	2,052
Interest income recognized	45
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member]
Average recorded investment with no allowance	893
Interest income recognized with no allowance	12
Average recorded investment with allowance	11
Interest income recognized with allowance	0
Average recorded investment	904
Interest income recognized	12
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member]
Average recorded investment with no allowance	71
Interest income recognized with no allowance	0
Average recorded investment with allowance	0
Interest income recognized with allowance	0
Average recorded investment	71
Interest income recognized	0
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member]
Average recorded investment with no allowance	0
Interest income recognized with no allowance	0
Average recorded investment with allowance	0
Interest income recognized with allowance	0
Average recorded investment	0
Interest income recognized	0
Commercial Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Average recorded investment with no allowance	582
Interest income recognized with no allowance	25
Average recorded investment with allowance	0
Interest income recognized with allowance	0
Average recorded investment	582
Interest income recognized	25
Commercial Portfolio Segment [Member] \| Commercial Business [Member]
Average recorded investment with no allowance	137
Interest income recognized with no allowance	8
Average recorded investment with allowance	31
Interest income recognized with allowance	0
Average recorded investment	168
Interest income recognized	8
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Average recorded investment with no allowance	155
Interest income recognized with no allowance	0
Average recorded investment with allowance	172
Interest income recognized with allowance	0
Average recorded investment	327
Interest income recognized	0
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member]
Average recorded investment with no allowance	0
Interest income recognized with no allowance	0
Average recorded investment with allowance	0
Interest income recognized with allowance	0
Average recorded investment	0
Interest income recognized	$ 0

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

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-17

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-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-Publisher FASB
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+ References

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