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Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]        
Ordinary shares, par value $ 0.0001 $ 0.0001 $ 0.0001 $ 0.0001