Revenue from Contracts with Customers - Summary of Revenue Recognized on Various Performance Obligations and Elected Accounting Expedients (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue related to deferred revenue balance at beginning of period	$ 25,901	$ 36,151	$ 36,770	$ 29,401
Revenue related to new performance obligations satisfied during the period	55,990	45,306	41,814	47,263
Revenue recognized under "right-to-invoice" expedient	68,877	61,114	62,105	56,811
Reimbursed travel expenses, shipping and other revenue	130	101	517	177
Total revenue	$ 150,898	$ 142,672	$ 141,206	$ 133,652	$ 293,570	$ 274,858