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Segment Reporting - Net Sales by Product and Services (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting    
Total net sales $ 312,189 $ 278,073
Products    
Segment Reporting    
Total net sales 171,968 143,941
Services    
Segment Reporting    
Total net sales $ 140,221 $ 134,132