Note 5 - Loans (Details) - Summary of Interest Foregone on Non-Accrual Loans and Loans Classified as TDR - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of Interest Foregone on Non-Accrual Loans and Loans Classified as TDR [Abstract]
Interest income that would have been recognized had the loans performed in accordance with their original terms	$ 627	$ 841	$ 1,879	$ 2,523
Less: Interest income included in the results of operations	153	153	540	572
Total foregone interest	$ 474	$ 688	$ 1,339	$ 1,951

The gross interest income that would have been recorded in the period on troubled debt restructurings and nonaccrual loans, if the loans had been current in accordance with their original terms and had been outstanding throughout the period or since origination, if held for part of the period.

No definition available.

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