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Revenues - Summary of Total Net Revenues by Product Line (Parenthetical) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Disaggregation of Revenue [Line Items]        
Net revenues $ 53,917 $ 48,011 $ 170,106 $ 108,866
Product and Services Revenues [Member]        
Disaggregation of Revenue [Line Items]        
Net revenues 53,229 46,749 165,549 105,972
Product and Services Revenues [Member] | Genomics [Member]        
Disaggregation of Revenue [Line Items]        
Net revenues 19,018 8,454 49,333 23,224
Product and Services Revenues [Member] | Genomics [Member] | Reclassification, Adjustment [Member]        
Disaggregation of Revenue [Line Items]        
Net revenues   (65)   (157)
Product and Services Revenues [Member] | Microbiome [Member]        
Disaggregation of Revenue [Line Items]        
Net revenues 1,693 1,530 5,888 3,869
Product and Services Revenues [Member] | Microbiome [Member] | Reclassification, Adjustment [Member]        
Disaggregation of Revenue [Line Items]        
Net revenues   (298)   (390)
Product and Services Revenues [Member] | COVID-19 [Member]        
Disaggregation of Revenue [Line Items]        
Net revenues $ 13,930 18,867 $ 54,147 27,918
Product and Services Revenues [Member] | COVID-19 [Member] | Reclassification, Adjustment [Member]        
Disaggregation of Revenue [Line Items]        
Net revenues   $ 363   $ 547