Revenue - Schedule of Recognized Revenue Net of Payments (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Gross revenue from sales to customers		$ 31,385	$ 28,356
Less: Clinical trial payments reducing revenue		1,123	2,717
Total net revenue	[1]	$ 30,262	$ 25,639

[1] Net revenue by country is categorized based on the location of the end customer