Commitments and Contingencies - Additional Information (Detail) - Research and Development Expense [Member] $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Commitments And Contingencies [Line Items]
Derecognition of right of use asset	$ 22.8
Derecognition of lease liabilities	20.0
Recognition of loss	$ 2.8