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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2020
Dec. 31, 2019
CONDENSED CONSOLIDATED BALANCE SHEETS    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 60,000,000 60,000,000
Common stock, shares issued 38,275,378 37,602,873
Common stock, shares outstanding 38,132,557 37,460,052
Treasury stock, shares 142,821 142,821