Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parentheticals)

v3.8.0.1
Consolidated Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2017
Dec. 31, 2016
Statement Of Financial Position [Abstract]    
Ordinary shares, par value (in dollars per share) $ 0.001 $ 0.001
Ordinary shares, authorized 490,000,000 490,000,000
Ordinary shares, issued 233,840,523 232,555,937
Ordinary shares, outstanding 228,528,562 227,243,976
Ordinary shares, treasury stock 5,311,961 5,311,961