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Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Jun. 30, 2020
Dec. 31, 2019
Common stock, par value (in dollars per share) $ 2 $ 2
Common stock, authorized (in shares) 18,000,000 18,000,000
Common stock, issued (in shares) 9,122,747 9,222,747
Common stock, outstanding (in shares) 9,122,747 9,222,747