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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares
Mar. 31, 2018
Dec. 31, 2017
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 142,857,000 142,857,000
Common stock, shares issued 5,748,000 5,729,000
Common stock, shares outstanding 5,748,000 5,729,000