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INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Sep. 30, 2020
Dec. 31, 2019
Class A ordinary shares [Member]    
Ordinary shares, par value   $ 0.0001
Ordinary shares authorized 200,000,000 200,000,000
Ordinary shares issued 24,622,785 22,635,396
Ordinary shares outstanding 24,622,785 22,635,396
Class B ordinary shares [Member]    
Ordinary shares, par value $ 0.0001  
Ordinary shares authorized 100,000,000 100,000,000
Ordinary shares issued 89,132,360 89,132,360
Ordinary shares outstanding 89,132,360 89,132,360