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Bank Borrowings (Details)
$ in Thousands, ¥ in Millions, kr in Millions
6 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
CNY (¥)
Jun. 30, 2022
SEK (kr)
May 31, 2022
USD ($)
Bank Borrowings          
Amount matured $ 1,001 $ 709      
East West Bank          
Bank Borrowings          
Maximum borrowing         $ 10,000
Amount outstanding 0        
China CITIC Bank Corporation Limited          
Bank Borrowings          
Maximum borrowing $ 3,000   ¥ 20.0    
Amount outstanding     ¥ 6.7 kr 1.0  
Interest rate 3.98%   3.98% 3.98%