Property, Plant, and Equipment, net - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 48,404	$ 54,629
Accumulated depreciation	(32,887)	(30,053)
Property, plant, and equipment, net	15,517	24,576
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	31,658	29,224
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	1,576	1,394
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	3,220	3,230
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	9,442	6,851
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 2,508	$ 4,130