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Revenues - Additional Information (Detail)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Supplier
Sep. 30, 2018
Sep. 30, 2019
USD ($)
Supplier
Sep. 30, 2018
Dec. 31, 2018
USD ($)
Revenue from contract with customer [Line Items]          
Deferred revenue $ 3,940   $ 3,940   $ 3,521
Long-term Contract [Member]          
Revenue from contract with customer [Line Items]          
Deferred revenue 1,790   1,790   1,464
Up Front Payment Arrangement [Member]          
Revenue from contract with customer [Line Items]          
Deferred revenue $ 2,150   $ 2,150   $ 2,057
DNA Genotek [Member]          
Revenue from contract with customer [Line Items]          
Number of third-party suppliers to manufacture DNAG's products | Supplier 2   2    
Customer [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]          
Revenue from contract with customer [Line Items]          
Percentage of concentration risk     24.00%    
Customer [Member] | Net Consolidated Revenue [Member] | Customer Concentration Risk [Member]          
Revenue from contract with customer [Line Items]          
Percentage of concentration risk 17.00% 39.00% 11.00% 27.00%