Note 4 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015 USD ($)
Number of loans	0	3
Pre-modification outstanding recorded investment		$ 533
Post-modification outstanding recorded investment		$ 533
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Number of loans		2
Pre-modification outstanding recorded investment		$ 388
Post-modification outstanding recorded investment		$ 388
Consumer Portfolio Segment [Member] \| Consumer Secured [Member]
Number of loans		1
Pre-modification outstanding recorded investment		$ 145
Post-modification outstanding recorded investment		$ 145

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524

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