Debt - Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Total interest expense	$ 2,136	$ 3,143
Convertible Senior Notes and Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Interest expense	1,506	1,288
Amortization of discounts and debt issuance costs	630	1,855
Total interest expense	$ 2,136	$ 3,143