Legal Proceedings and Other Contingencies - Additional Information (Detail)		6 Months Ended
	May 05, 2011 Agreement Plaintiff	Jun. 30, 2019 USD ($) Installment
Loss Contingencies [Line Items]
Workmen's compensation insurance policy per claim deductible		$ 250,000
Number of settlement agreements | Agreement	2
Number of plaintiff | Plaintiff	2
Remaining obligation to pay product liability settlement to plaintiffs		$ 1,140,000
Number of installments for the payment of product liability settlement | Installment		12
Annual installment amount		$ 95,000
Settlement agreements date		May 5, 2011
Settlement payment terms		The Company has a remaining obligation under the agreements to pay the plaintiffs an aggregate of $1,330 without interest in 14 annual installments of $95 on or before May 22 of each year.
Estimated Reserve for Product Liability Claims, change in period		12 months
Maximum exposure of residual guarantees		$ 1,600,000
Liability recorded for residual guarantees		0
Minimum [Member]
Loss Contingencies [Line Items]
Product liability insurance self insurance retention amount		50,000
Maximum workmen's compensation insurance policy aggregate		1,000,000
Maximum [Member]
Loss Contingencies [Line Items]
Product liability insurance self insurance retention amount		500,000
Maximum workmen's compensation insurance policy aggregate		$ 1,875,000