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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Ordinary shares, par value $ 0.00166667 $ 0.00166667
Ordinary shares, authorized 30,000,000 30,000,000
Ordinary shares, issued 6,905,248 6,905,248
Ordinary shares, outstanding 6,905,248 6,905,248