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Note 10 - Short-term Borrowings - Repurchase Agreements (Details) - Overnight and Continuous [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Repurchase agreements	$ 1,989	$ 2,129
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Repurchase agreements	2,040	2,667
US States and Political Subdivisions Debt Securities [Member]
Repurchase agreements	495	968
US Government Agencies Debt Securities [Member]
Repurchase agreements	$ 2,535	$ 3,635

X

- Definition

Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(m)(1)(i)(A)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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- Details

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