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Operating Income - Summary of Operating Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Research Tax Credit	$ 1,647	$ 1,815	$ 5,324	$ 7,615
Other Operating (loss) income	(324)	2,344	(2,549)	4,873
Total	$ 1,323	$ 4,158	$ 2,776	$ 12,488