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Segment Information - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Country
Customer
Jun. 30, 2020
Country
Customer
Jun. 30, 2021
Segment
Country
Customer
Jun. 30, 2020
Country
Customer
Dec. 31, 2020
Country
Segment Reporting Information          
Number of operating segments | Segment     1    
Geographic Concentration Risk          
Segment Reporting Information          
Number of Individual Country accounted for 10% or more of total revenues   0   0  
Number of Individual country accounted for 10% or more of total consolidated assets 0   0   0
Geographic Concentration Risk | Germany          
Segment Reporting Information          
Number of Individual Country accounted for 10% or more of total revenues     1    
Customer Concentration Risk | Sales Revenue, Goods, Net          
Segment Reporting Information          
Number of Individual Customer accounted for 10% or more of total consolidated revenues | Customer 0 0 0 0