Subsequent Events - Additional Information (Detail) - Stock Purchase and Merger Agreements [Member]	3 Months Ended	9 Months Ended
	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jan. 01, 2021 USD ($)
Subsequent Event [Line Items]
Number of acquired companies		2
Subsequent Event [Member]
Subsequent Event [Line Items]
Initial period acquisition cost	$ 225,000,000
Deferred payment			$ 145,000,000