Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Securities held to maturity, fair value	$ 19,330	$ 19,171
Common stock, stated value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,342,846	5,325,504
Treasury stock, shares (in shares)	659,739	659,739