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CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2022
Dec. 31, 2021
Preferred stock, par value (in dollars per share) $ 1 $ 1
Common stock, par value (in dollars per share) $ 0 $ 0
Common Stock, authorized shares 100,000,000  
Common Stock, issued shares 34,023,104 34,023,104
Common Stock, Shares, Outstanding 32,935,959 33,484,935
Common stock in treasury - at cost (1,087,145)  
Preferred Class B    
Preferred Stock, authorized shares 5,000,000 5,000,000