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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Mar. 31, 2017
Dec. 31, 2016
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 350,000,000 350,000,000
Common stock, shares issued 40,406,068 38,884,068
Common stock, shares outstanding 40,338,474 38,816,474
Treasury stock, shares 67,594 67,594