Debt - Summary of Interest Expense on Convertible Debt (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule Of Interest Expenses [Line Items]
Total interest expense on convertible debt	$ 3,806	$ 3,804
Convertible Senior Notes
Schedule Of Interest Expenses [Line Items]
Coupon interest expense	2,616	2,616
Accretion of discount on convertible notes	836	834
Amortization of debt issuance costs	148	148
Total interest expense on convertible debt	$ 3,600	$ 3,598