Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Allowance for loan losses	$ 6,639	$ 6,508
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, authorized (in shares)	3,000,000	3,000,000
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)	2,800,729	2,800,729
Common stock, outstanding (in shares)	2,698,712	2,698,712
Treasury stock (in shares)	102,017	102,017
Series C Preferred Stock [Member]
Preferred stock, issued (in shares)	268,888	268,888
Preferred stock, outstanding (in shares)	268,888	268,888
Preferred stock, liquidation value	$ 2,900	$ 2,900
Series D Preferred Stock [Member]
Preferred stock, issued (in shares)	133,705	133,705
Preferred stock, outstanding (in shares)	133,705	133,705
Preferred stock, liquidation value	$ 1,300	$ 1,300