Summary of Significant Accounting Policies - Summary of Product Revenue by Geographical Locations of Customers (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Total product revenue	$ 114,249	$ 93,774	$ 76,051
Product
Disaggregation Of Revenue [Line Items]
Total product revenue	91,920	74,649	60,908
Product | Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Total product revenue	57,427	52,499	46,974
Product | North America
Disaggregation Of Revenue [Line Items]
Total product revenue	32,380	20,936	12,696
Product | Other
Disaggregation Of Revenue [Line Items]
Total product revenue	$ 2,113	$ 1,214	$ 1,238