Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	$ 242,216	$ 233,061
Accumulated depreciation	(182,964)	(169,448)
Property, plant, and equipment, net	59,252	63,613
Buildings [Member]
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	3,925	4,096
Plant and equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	50,275	50,159
Instrumentation [Member]
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	100,515	93,252
Computer software [Member]
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	53,200	52,565
Furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	8,307	8,024
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	2,597	1,628
Finance lease assets [Member]
Property Plant And Equipment [Line Items]
Property, plant, and equipment, gross	$ 23,397	$ 23,337