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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts payable | $ 17,643 | $ 12,941
Advance from customers | 21,731 | 17,732
Accrued expenses and other current liabilities | $ 28,642 | $ 22,688
Ordinary shares, par value (in dollars per share) | $ 0.000067 | $ 0.000067
Ordinary shares, shares authorized | 750,000,000 | 750,000,000
Ordinary shares, shares issued | 203,349,887 | 150,011,929
Ordinary shares, shares outstanding | 187,214,651 | 134,456,369
Treasury stock, shares | 14,011,790 | 13,525,810
Consolidated VIEs |  |
Accounts payable | $ 135 | $ 5
Accrued expenses and other current liabilities | $ 1,012 | $ 4,673

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