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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2020
Dec. 31, 2019
CONSOLIDATED BALANCE SHEETS    
Common stock, par value $ 1 $ 1
Common stock, shares authorized 40,000,000 40,000,000
Common stock, shares issued 21,589,940 18,996,948
Treasury stock, shares 194,682 194,682