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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Common stock par value $ 0.001 $ 0.001
Common stock shares authorized 500,000,000 500,000,000
Common stock shares issued 26,791,684 26,367,523
Common stock shares outstanding 26,647,478 26,223,317