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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended	6 Months Ended
	Jul. 18, 2019	Oct. 31, 2019	Dec. 31, 2019
Commitments and Contingencies [Line Items]
Settlement agreement date	July 18, 2019
Settlement amount	$ 9.1
Settlement dismissal date		Oct. 29, 2019
Operating lease weighted average remaining lease term			5 years 8 months 12 days
Operating lease weighted average discount rate percent			3.87%
Operating Expense [Member]
Commitments and Contingencies [Line Items]
Lease cost			$ 8.9
Variable lease expense			1.2
Short-term lease expense			$ 0.2
Minimum [Member] | Office Spaces, Research and Development Laboratory Facilities, Vehicles and Office Equipment [Member]
Commitments and Contingencies [Line Items]
Remaining lease term period			1 year
Maximum [Member] | Office Spaces, Research and Development Laboratory Facilities, Vehicles and Office Equipment [Member]
Commitments and Contingencies [Line Items]
Remaining lease term period			6 years

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