Property, Plant, and Equipment, net - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 65,731	$ 73,968
Accumulated depreciation	(41,343)	(36,101)
Property, plant, and equipment, net	24,388	37,867
Land
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	0	995
Building
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	0	8,805
Equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	47,711	42,330
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	1,571	1,394
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	3,377	3,378
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	9,794	7,180
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 3,278	$ 9,886