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Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2018
Dec. 31, 2017
Condensed Consolidated Balance Sheets    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 245,000,000 245,000,000
Common stock, shares issued 11,635,116 11,587,963
Common stock, shares outstanding 11,635,116 11,587,963