Note 5 - Loans - Troubled Debt Restructurings With Subsequent Default (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Commercial Portfolio Segment [Member]
Number of contracts		1		1
Recorded investment		$ 695		$ 695
Number of contracts		1		1
Recorded investment		$ 695		$ 695

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953682-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration