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Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Mar. 31, 2020
Dec. 31, 2019
Loss on Limited Partnership Interest    
Preferred stock, par value (in dollars per share) $ 1.00 $ 1.00
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 1.00 $ 1.00
Common stock, shares authorized 20,000,000 20,000,000
Common stock, shares issued 7,462,247 7,440,026
Common stock, shares outstanding 7,462,247 7,440,026