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Accrued Expenses and Other Current Liabilities (Details) - Schedule of accrued expenses and other current liabilities - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Schedule of accrued expenses and other current liabilities [Abstract] |  |  |
Payables to exiting investors |  | $ 30,000 |
Payables for purchase of property, plant and equipment | 13,017 | 15,122 | 23,515
Product warranty | 18,690 | 4,296 | 3,723
Other current liabilities | 8,469 | 3,959 |
Accrued payroll and welfare | 2,818 | 2,704 | 2,577
Interest payable | 2,674 | 1,379 |
Accrued expenses | 1,972 | 1,696 | 2,103
Other tax payable | 425 | 1,472 | 494
Total | $ 48,065 | $ 60,628 | $ 34,995

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