XML 51 R44.htm IDEA: XBRL DOCUMENT v3.26.1

Inventories - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Inventory Disclosure [Abstract]
Capitalized direct labor expense included in work in process	$ 1.8		$ 1.3
Rental depreciation expense under short-term leases with purchase options	$ 3.6	$ 2.8

X

- Definition

Capitalized direct labor expense included in work in process.

+ References

No definition available.

+ Details

Name:	altg_CapitalizedDirectLaborExpenseIncludedInWorkInProcess
Namespace Prefix:	altg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Rental depreciation expense.

+ References

No definition available.

+ Details

Name:	altg_RentalDepreciationExpense
Namespace Prefix:	altg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_InventoryDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration