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Land Use Rights, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Land Use Rights Net [Abstract] |  |  |
Estimated usage term period | 50 years |  |
Amortization expenses | $ 325 | $ 303 | $ 302
Description of future amortization expense | Future amortization expense is $325 per year for each of the next five years through December 31, 2026 and thereafter. |  |

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