Summary of Significant Accounting Policies - Summary of Product Revenue by Geographical Locations of Customers (Detail) - Product - 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]
Total product revenue	$ 36,131	$ 23,607	$ 90,994	$ 63,721
North America
Disaggregation Of Revenue [Line Items]
Total product revenue	20,860	8,465	45,171	20,942
Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Total product revenue	14,965	14,527	44,473	41,210
Other
Disaggregation Of Revenue [Line Items]
Total product revenue	$ 306	$ 615	$ 1,350	$ 1,569