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Consolidated Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2019
Dec. 31, 2018
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 $ 1
Common stock, shares authorized (in shares) 20,000,000 20,000,000
Common stock, shares issued (in shares) 13,934,996 12,655,171
Common stock, shares outstanding (in shares) 13,716,445 12,319,330
Treasury stock, shares (in shares) 218,551 335,841