Note 10 - Securities Sold Under Agreements to Repurchase and Other Short-Term Borrowings (Details) - Securities Sold Under Agreements to Repurchase - Securities Sold under Agreements to Repurchase [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Short-term Debt [Line Items]
Average balance during the year	$ 65,140	$ 61,748
Average interest rate during the year	0.23%	0.23%
Maximum month-end balance during the year	$ 82,467	$ 69,559