Accounts Payable, Accrued Expenses and Other Current Liabilities - Schedule of Reconciliation of Severance Costs Within Accrued Payroll Related to Scheduled Benefit Payments (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Employee Related Liabilities Current [Abstract]
Additional charges	$ 4,864
Less payments made to employees	4,219
Severance costs,Closing Balance	$ 645