Financial Instruments - Summary of Changes in Fair Value of the Company's Liability for Contingent Consideration (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Contingent Consideration Liability [Roll Forward]
Liability at the beginning of the period	$ 1,285
Change in fair value of contingent consideration liability	31	$ 0
Liability at end of the period	$ 1,316