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CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
CONSOLIDATED BALANCE SHEETS    
Preferred stock, par value (in dollars per share) $ 1,000 $ 1,000
Preferred stock, authorized shares (in shares) 30,000 30,000
Preferred stock, liquidation preference per share (in dollars per share) $ 1,000 $ 1,000
Preferred stock, shares issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 1.00 $ 1.00
Common stock, shares authorized (in shares) 20,000,000 20,000,000
Common stock, shares issued (in shares) 15,982,815 13,934,996
Common stock, shares outstanding (in shares) 15,911,984 13,716,445
Treasury stock, shares (in shares) 70,831 218,551