XML 88 R31.htm IDEA: XBRL DOCUMENT v3.20.2
Other Financial Statement Information - Schedule of Changes in the Reserve for Product Warranties (Detail) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Beginning of period $ 467 $ 804
Additions charged to cost of revenue 197 741
Repairs and replacements (319) (1,078)
End of period $ 345 $ 467