Restructuring - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended	9 Months Ended		12 Months Ended
	Jul. 15, 2021	Sep. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Restructuring Cost And Reserve [Line Items]
Proceeds from sale of fixed assets							$ 6,589	$ 859
Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charge, employee severance						$ 400
Selling, General and Administrative Expense [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charge, employee severance						300
Automotive Racing Market Segment [Member]
Restructuring Cost And Reserve [Line Items]
Non-cash restructuring charge			$ 3,400
Restructuring charge, write-down of after-market inventory to salvage value			1,300
Restructuring charge, employee severance			1,000			$ 700
Restructuring charges, contract terminations costs			500
Automotive Racing Market Segment [Member] | Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Non-cash restructuring charge			2,800
Automotive Racing Market Segment [Member] | Selling, General and Administrative Expense [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charge, employee severance			$ 600
Fayetteville, Arkansas Manufacturing Facility [Member]
Restructuring Cost And Reserve [Line Items]
Relocation costs		$ 500		$ 1,800			1,800
Additional charges to cost of sales									$ 3,300
Restructuring severance accrual		200					200
Proceeds from sale of fixed assets	$ 7,100
Charges incurred on environmental remediation		$ 100					$ 1,500
Fayetteville, Arkansas Manufacturing Facility [Member] | Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Non-cash restructuring charge					$ 13,000
Fayetteville, Arkansas Manufacturing Facility [Member] | Selling, General and Administrative Expense [Member]
Restructuring Cost And Reserve [Line Items]
Gain on sale of facility	$ 4,400