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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]      
Common stock, par value $ 0.001 $ 0.001 $ 0.001
Common stock, shares authorized 50,000,000 50,000,000 50,000,000
Common stock, shares issued 17,376,012 16,815,850 14,908,439
Common stock, shares outstanding 17,376,012 16,815,850 14,908,439