Fair Value Measurements - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) Company	Dec. 31, 2019 USD ($)
Fair Value Disclosures [Abstract]
Fair value of future expected acquisition-related contingent consideration obligations	$ 0.9	$ 0.8
Number of companies acquired | Company	3
Business acquisition, total consideration	$ 5.5
Business acquisition, consideration in cash	2.0
Business acquisition, deferred payments	1.5
Business acquisition, stock	1.2
Business acquisition, future earnouts	$ 1.0