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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Allowance for trade accounts $ 891 $ 885
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 50,000,000 100,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 450,000,000 450,000,000
Common stock, shares issued 35,442,112 35,353,269
Common stock, shares outstanding 35,442,112 35,353,269