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Revolving Credit Facilities - China Line of Credit (Details) - Line of Credit - Revolving Credit Facility
1 Months Ended 6 Months Ended
Aug. 31, 2013
USD ($)
Sep. 30, 2021
USD ($)
Aug. 31, 2013
CNY (¥)
Second Amended China Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 46,445,000   ¥ 300,000,000
Interest rate, effective percentage   4.15%  
Proceeds from lines of credit   $ 0  
Repayments of lines of credit   0  
Long-term line of credit   0  
Outstanding bank guarantees   31,000  
Amount available under the credit agreement   $ 46,414,000  
Second Amended China Credit Facility, Overdraft Sublimit      
Debt Instrument [Line Items]      
Line of credit facility overdraft facility sublimit $ 15,482,000   ¥ 100,000,000
China Credit Agreement      
Debt Instrument [Line Items]      
Guarantor obligation 108.50%    
Maximum | Second Amended China Credit Facility      
Debt Instrument [Line Items]      
Debt instrument term 12 months