Fair Value Measurements - Summary of Fair Value of Investments Based upon Contractual Maturities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Less than one year	$ 17,191	$ 18,290
Due in 1 - 5 years	7,117	9,821
Total	$ 24,308	$ 28,111