Note 4 - Loans Receivable, Net - Impaired Loans (Details) $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($)
Recorded Investment	$ 5,566
Unpaid Principal Balance	6,998
Related Allowance	0
Average Recorded Investment	5,715
Interest Income Recognized	0
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Recorded Investment	115
Unpaid Principal Balance	115
Related Allowance	0
Average Recorded Investment	117
Interest Income Recognized	0
Commercial Real Estate Portfolio Segment [Member] \| Residential Mortgage [Member]
Recorded Investment	1,089
Unpaid Principal Balance	1,626
Related Allowance	0
Average Recorded Investment	1,133
Interest Income Recognized	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Recorded Investment	4,282
Unpaid Principal Balance	4,282
Related Allowance	0
Average Recorded Investment	4,382
Interest Income Recognized	0
Commercial and Agricultural Loans [Member]
Recorded Investment	31
Unpaid Principal Balance	926
Related Allowance	0
Average Recorded Investment	31
Interest Income Recognized	0
Consumer Portfolio Segment [Member] \| Home Equity Line of Credit [Member]
Recorded Investment	49
Unpaid Principal Balance	49
Related Allowance	0
Average Recorded Investment	52
Interest Income Recognized	0
Consumer Portfolio Segment [Member] \| Other Consumer Loans [Member]
Recorded Investment	0
Unpaid Principal Balance	0
Related 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/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-17

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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+ References

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-Topic 310
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 310
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