SUPPLEMENTAL BALANCE SHEET INFORMATION - Composition of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 265,705	$ 241,649
Accumulated depreciation	(74,637)	(55,450)
Net property and equipment	191,068	186,199
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	30,710	20,025
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	120,932	110,572
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	81,372	68,628
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,223	1,905
Other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,664	0
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 25,804	$ 40,519