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ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) | 12 Months Ended
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Dec. 31, 2019
Other Liabilities, Current [Abstract] |
Summary of Accrued Expenses and Other Current Liabilities |
|  | December 31, |
|  | 2018 |  |  | 2019 |
Accrued expenses |  | $ | 32,634 |  |  | $ | 53,738 |
Hedging transaction liability |  |  | 2,596 |  |  |  | 696 |
Uncertain tax positions |  |  | 334 |  |  |  | 2,030 |
|  | $ | 35,564 |  |  | $ | 56,464 |

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