Revolving Credit Agreements - Additional Information (Detail)				1 Months Ended		3 Months Ended
	Mar. 29, 2023 USD ($)	Aug. 08, 2022 USD ($)	Aug. 05, 2022	Dec. 31, 2024	Sep. 30, 2024	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jul. 18, 2022 USD ($)	Sep. 30, 2018 USD ($)
Line Of Credit Facility [Line Items]
Weighted average interest rate						6.20%
Debt instrument default interest rate percentage						2.00%
Daily Simple SOFR [Member]
Line Of Credit Facility [Line Items]
Credit facility, floor rate						0.00%
EURIBOR [Member]
Line Of Credit Facility [Line Items]
Credit facility, floor rate						0.00%
Maximum [Member] | Daily Simple SOFR [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						2.15%
Maximum [Member] | Base Rate [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						1.25%
Maximum [Member] | EURIBOR [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						2.25%
Minimum [Member] | Daily Simple SOFR [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						1.40%
Minimum [Member] | Base Rate [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						0.50%
Minimum [Member] | EURIBOR [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						1.50%
Wells Fargo Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Commitment fee percentage						0.25%
Net leverage ratio			3
Line of credit maturity period month and year						2027-07
Wells Fargo Credit Agreement [Member] | Daily Simple SOFR [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						1.00%
Wells Fargo Credit Agreement [Member] | Federal Reserve Bank Advances [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate						1.00%
New Nord/LB Revolving Line of Credit [Member]
Line Of Credit Facility [Line Items]
Revolving line of credit	$ 16,100,000					$ 10,800,000
New Nord/LB Revolving Line of Credit [Member] | Euro Short Term Rate [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate	1.94%
Nord/LB Revolving Line of Credit [Member]
Line Of Credit Facility [Line Items]
Revolving line of credit		$ 16,100,000
Available for future borrowings		$ 0
Line of credit maturity period month and year		2023-08
Nord/LB Revolving Line of Credit [Member] | Euro Short Term Rate [Member]
Line Of Credit Facility [Line Items]
Applicable margin rate		1.40%
Syndicated Credit Agreement Working Capital Line of Credit [Member]
Line Of Credit Facility [Line Items]
Available for future borrowings									$ 0
DZ Bank Revolving Line Of Credit [Member]
Line Of Credit Facility [Line Items]
Revolving line of credit							$ 9,100,000
Available for future borrowings							$ 0
Interest rate							2.80%
Acorn HoldCo, Inc., [Member] | Wells Fargo Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Secured revolving credit facility amount						400,000,000		$ 100,000,000
Revolving line of credit						180,000,000
Credit facility, average outstanding amount						3,400,000
Letters of credit may be issued						25,000,000
Available for future borrowings						216,600,000
Acorn HoldCo, Inc., [Member] | Wells Fargo Credit Agreement [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Credit agreement current borrowing capacity						$ 400,000,000
Bayerische Landesbank and Deutsche Bank [Member] | Syndicated Credit Agreement Working Capital Line of Credit [Member]
Line Of Credit Facility [Line Items]
Secured revolving credit facility amount									$ 10,700,000
Scenario Forecast [Member] | Wells Fargo Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Net leverage ratio				2.75	3.25