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Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 32,000,000 32,000,000
Common stock, shares issued 21,964,505 21,743,498
Common stock, shares outstanding 21,964,505 21,743,498