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Borrowings - Revolving Credit Facility Borrowings, Net (Details)
¥ in Millions
Jun. 30, 2023
USD ($)
Jun. 30, 2023
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CNY (¥)
Jun. 30, 2022
USD ($)
Wells Fargo Credit Facility [Member]          
Bank indebtedness [Line Items]          
Borrowings $ 20,000,000   $ 25,000,000   $ 0
Revolving Credit Facility [Member]          
Bank indebtedness [Line Items]          
Unamortized debt issuance costs (1,276,000)   (1,759,000)    
Revolving Credit Facility Borrowings, net 28,002,000   36,111,000    
Bank of China Facility [Member]          
Bank indebtedness [Line Items]          
Borrowings 400,000 ¥ 2.6 400,000 ¥ 2.6  
Bank of China Facility [Member] | Revolving Credit Facility [Member]          
Bank indebtedness [Line Items]          
Borrowings 361,000   374,000    
HSBC China Facility [Member]          
Bank indebtedness [Line Items]          
Borrowings $ 8,900,000 ¥ 64.4 $ 12,500,000 ¥ 87.0 $ 0