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Consolidated Balance Sheet (Unaudited) (Parentheticals) - $ / shares
Jun. 30, 2022
Dec. 31, 2021
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 60,000,000  
Common stock, shares issued (in shares) 40,996,566 40,893,396
Treasury stock, shares (in shares) 692,176 412,769