Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parentheticals)

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Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares
Sep. 30, 2015
Dec. 31, 2014
Statement Of Financial Position [Abstract]    
Ordinary shares, par value (in dollars per shares) $ 0.001 $ 0.001
Ordinary shares, authorized 490,000,000 490,000,000
Ordinary shares, issued 232,069,970 230,116,780
Ordinary shares, outstanding 229,453,999 227,630,430
Treasury stock, shares 2,615,971 2,486,350