Credit Agreements - Additional Information (Detail)		3 Months Ended
	Jun. 04, 2024 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2025	Dec. 31, 2025 USD ($)
Line Of Credit Facility [Line Items]
Weighted average interest rate		8.92%
Revolving line of credit		$ 25,000,000		$ 25,000,000
Cash and cash equivalents		88,270,000		95,696,000
Wells Fargo Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Revolving line of credit		25,000,000		$ 25,000,000
Net leverage ratio			0.0325
Wells Fargo Credit Agreement [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Net leverage ratio			0.05
Wells Fargo Credit Agreement [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Fixed charge coverage ratio			0.0125
Wells Fargo Credit Agreement German Borrower [Member]
Line Of Credit Facility [Line Items]
Secured revolving credit facility amount		350,000,000
Acorn HoldCo, Inc., [Member] | Wells Fargo Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Secured revolving credit facility amount	$ 350,000,000	350,000,000
Revolving line of credit		25,000,000
Credit facility, average outstanding amount	$ 50,000,000
Letters of credit may be utilize		50,000,000
Available for future borrowings		319,200,000
Acorn HoldCo, Inc., [Member] | Wells Fargo Credit Agreement - Subline [Member]
Line Of Credit Facility [Line Items]
Credit facility, average outstanding amount		5,800,000
Acorn HoldCo, Inc., [Member] | Wells Fargo Credit Agreement - US Borrower [Member]
Line Of Credit Facility [Line Items]
Revolving line of credit		25,000,000
Acorn HoldCo, Inc., [Member] | Wells Fargo Credit Agreement German Borrower [Member]
Line Of Credit Facility [Line Items]
Credit facility, average outstanding amount		$ 50,000,000
First Quarter Ending Springing Covenant Period [Member] | Wells Fargo Credit Agreement [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Net leverage ratio		0.04
Third and Fourth Quarters Ending Springing Covenant Event [Member] | Wells Fargo Credit Agreement [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Net leverage ratio			0.035