Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans, allowance for loan losses	$ 6,622	$ 6,669
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	22,500,000	22,500,000
Preferred stock, shares outstanding (in shares)	5,082,676	5,064,972
Common stock, shares issued (in shares)	5,082,676	5,064,972