Property, Plant, and Equipment, net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 1,600		$ 1,000	$ 3,000	$ 2,000
Loss (gain) on sale of assets	(24)		$ 788	$ 1,147	$ 601
Asset impairment charges		$ 3,000
United States | Long-lived Assets | Geographic Concentration Risk
Property, Plant and Equipment [Line Items]
Concentration risk, percentage				94.70%		95.40%
Disposal Group, Held-for-sale, Not Discontinued Operations | Tinley Park Facility
Property, Plant and Equipment [Line Items]
Property, plant, and equipment held for sale	$ 10,300			$ 10,300
Loss (gain) on sale of assets				$ 1,200