Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Allowance for loan losses	$ 6,360	$ 6,127
Common stock, par value (in dollars per share)	$ 1.25	$ 1.25
Common stock, authorized (in shares)	12,000,000	12,000,000
Common stock, issued (in shares)	2,373,156	2,373,156
Common stock, outstanding (in shares)	2,271,139	2,271,139
Treasury stock (in shares)	102,017	102,017