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CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares
Mar. 31, 2022
Dec. 31, 2021
CONDENSED CONSOLIDATED BALANCE SHEETS    
Common stock, par value (in dollars per share) $ 0.20 $ 0.20
Common stock, shares authorized 4,000,000 4,000,000
Common stock, shares issued 2,614,506 2,614,506
Common stock, shares outstanding 2,435,032 2,435,032
Treasury stock, shares 122,839 122,839