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Bank Borrowings (Details)
$ in Thousands, ¥ in Millions
9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2022
CNY (¥)
May 31, 2022
USD ($)
Bank Borrowings          
Amount matured $ 4,001 $ 709      
East West Bank          
Bank Borrowings          
Maximum borrowing         $ 10,000
Amount outstanding $ 3,000        
China CITIC Bank Corporation Limited          
Bank Borrowings          
Maximum borrowing     $ 3,000 ¥ 20.0  
Amount outstanding     $ 1,000 ¥ 6.7  
Interest rate     3.98% 3.98%