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Financial Assets at Amortized Cost (Tables) | 12 Months Ended
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Dec. 31, 2020
Financial Assets at Amortized Cost |
Schedule of financial assets at amortized cost |
|  | December 31, |  | December 31,
|  | 2019 |  | 2020
|  | (in thousands)
Time deposit with original maturities more than three months |  | $ | 11,049 |  | 8,682

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