Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 26,051		$ 26,051		$ 23,857
Assets acquired			7,500
Amortization expense of intangible assets	1,500	$ 1,200	4,200	$ 3,500
Cost of Testing Services
Goodwill And Intangible Assets [Line Items]
Amortization expense of intangible assets	300	300	1,000	1,000
Cost of Product
Goodwill And Intangible Assets [Line Items]
Amortization expense of intangible assets	400	400	1,400	1,200
Cost of Digital and Other
Goodwill And Intangible Assets [Line Items]
Amortization expense of intangible assets	300	100	500	200
Sales and Marketing Expense
Goodwill And Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 500	$ 400	1,300	$ 1,100
Acquired in-process technology
Goodwill And Intangible Assets [Line Items]
Assets acquired			2,000
Acquired and developed technology
Goodwill And Intangible Assets [Line Items]
Assets acquired			3,600
Commercialization rights
Goodwill And Intangible Assets [Line Items]
Assets acquired			2,500
Customer relationships
Goodwill And Intangible Assets [Line Items]
Assets acquired			1,100
Other
Goodwill And Intangible Assets [Line Items]
Assets acquired			$ 300