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Commitments and Contingencies - Schedule of Activities Related to Warranty Obligations (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Commitments And Contingencies Disclosure [Abstract]        
Beginning balance $ 851 $ 1,192 $ 699 $ 1,178
Provision for warranty 582 291 1,277 723
Utilization (611) (550) (1,154) (968)
Ending balance $ 822 $ 933 $ 822 $ 933