Segment, Customer and Geographic Information - Revenue by Geographical Location (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Major Customer [Line Items]
Revenue	$ 159,518	$ 114,249	$ 93,774
Product
Revenue, Major Customer [Line Items]
Revenue	130,859	91,920	74,649
Product | UNITED STATES
Revenue, Major Customer [Line Items]
Revenue	67,498	31,517	20,611
Product | FRANCE
Revenue, Major Customer [Line Items]
Revenue	20,887	19,404	20,075
Product | Other Countries
Revenue, Major Customer [Line Items]
Revenue	42,474	40,999	33,963
Government Contract
Revenue, Major Customer [Line Items]
Revenue	28,659	22,329	19,125
Government Contract | UNITED STATES
Revenue, Major Customer [Line Items]
Revenue	$ 28,659	$ 22,329	$ 19,125