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Bank Borrowings (Details) - Schedule of bank borrowings - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Schedule of bank borrowings [Abstract]            
Beginning balance $ 26,458 $ 9,412 $ 12,184 $ 11,922    
Proceeds from bank borrowings 5,757 26,603 15,230 $ 17,308 $ 17,735
Repayments of principal (3,400) (5,696) (15,665) (17,590) (17,815) (71,674)
Exchange difference (207) 321 (271) 232 $ 769 $ (406)
Ending balance $ 22,851 $ 9,794 $ 22,851 $ 9,794