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Note 4 - Loans and Allowance for Loan Losses (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018	Sep. 30, 2019 USD ($)	Sep. 30, 2018	Dec. 31, 2018 USD ($)
Increase (Decrease) in Other Loans			$ 155
Change In Troubled Debt Restructurings			1.80%
Impaired Financing Receivable, Related Allowance					$ 98
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend	$ 1,428		$ 1,428		758
Financing Receivable, Modifications, Number of Contracts	0	0	2	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down			$ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts	1	0	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 133
Minimum Loan Balance For Loans Evaluated by Risk Categories	750		$ 750
Troubled Debt Restructurings [Member]
Impaired Financing Receivable, Related Allowance	$ 0		$ 0		$ 98
Unsecured [Member]
Percentage of Loan Portfolio	4.80%		4.80%		5.02%
Residential Portfolio Segment [Member]
Real Estate Acquired Through Foreclosure	$ 68		$ 68		$ 68
Mortgage Loans in Process of Foreclosure, Amount	1,561		1,561		$ 2,375
Impaired Financing Receivable, Related Allowance
Financing Receivable, Modifications, Number of Contracts			1

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- Definition

The change during the period in loans modified as troubled debt restructurings.

+ References

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
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Amount of allowance for credit losses related to recorded investment.

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Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring.

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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

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