XML 91 R34.htm IDEA: XBRL DOCUMENT v3.20.2
Other Financial Statement Information - Schedule of Revenue by Source (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Revenue from External Customer [Line Items]        
Revenue $ 42,905 $ 55,819 $ 114,810 $ 109,397
Instruments        
Revenue from External Customer [Line Items]        
Revenue 7,291 8,302 16,432 15,150
Consumables        
Revenue from External Customer [Line Items]        
Revenue 34,164 46,538 95,592 92,389
Services        
Revenue from External Customer [Line Items]        
Revenue $ 1,450 $ 979 $ 2,786 $ 1,858