Inventories - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Inventory Disclosure [Abstract]
Proceeds from federal relief grants	$ 0	$ 0	$ 1,123,000	$ 4,299,000	$ 4,299,000	$ 4,629,000
Insurance Expenses Incurred					$ 2,250,000