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Revenue (Summary of Revenue by Category) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Product Information [Line Items]        
Total revenue $ 35,467 $ 30,610 $ 68,640 $ 59,607
Product [Member]        
Product Information [Line Items]        
Total revenue 30,175 26,533 58,419 51,836
Instrument [Member]        
Product Information [Line Items]        
Total revenue 15,619 14,282 31,169 29,221
Consumable [Member]        
Product Information [Line Items]        
Total revenue 14,556 12,251 27,250 22,615
Service and Other [Member]        
Product Information [Line Items]        
Total revenue $ 5,292 $ 4,077 $ 10,221 $ 7,771