SUPPLEMENTAL BALANCE SHEET INFORMATION - Composition of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 282,519	$ 265,705
Accumulated depreciation	(94,191)	(74,637)
Net property and equipment	188,328	191,068
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	30,768	30,710
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	140,485	120,932
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	93,880	81,372
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,542	3,223
Other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,355	3,664
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 9,489	$ 25,804