Income Taxes - Net Operating Loss Carryforwards (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
U.S. state income tax
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, amount	$ 106,987
U.S. state income tax | Minimum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2021
U.S. state income tax | Maximum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2040
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, amount	$ 7,441
Foreign | Minimum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2021
Foreign | Maximum
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, year of expiration	2025
Indefinite
Operating Loss Carryforwards [Line Items]
Operating loss carryforward, amount	$ 161,851
Operating loss carryforward, year of expiration	Never