Restructuring - Additional Information (Detail) - Fayetteville, Arkansas Manufacturing Facility [Member] - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Accelerated depreciation		$ 7.6	$ 7.6
Restructuring charge, write-down of inventory to net salvage value		3.2
Restructuring charge, employee severance		1.6
Restructuring charge, accelerated amortization of right of use assets		0.6
Relocation costs	$ 1.8
Restructuring severance accrual	$ 1.1		$ 1.1
Minimum [Member]
Restructuring Cost And Reserve [Line Items]
Relocation costs recognition period			12 months
Maximum [Member]
Restructuring Cost And Reserve [Line Items]
Relocation costs recognition period			18 months
Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Non-cash restructuring charge		$ 13.0