Trade Accounts and Financing Receivables - Financing Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Accounts Notes And Loans Receivable [Line Items]
Total financing receivables	$ 14,416	$ 7,896
Total unearned income		(6)
Total financing receivables, net of unearned income	14,416	7,890
Less current portion	(14,110)	(4,952)
Non-current notes receivable	306	2,938
Promissory Notes
Accounts Notes And Loans Receivable [Line Items]
Total financing receivables	$ 14,416	5,432
Sales-type Lease
Accounts Notes And Loans Receivable [Line Items]
Total financing receivables		2,464
Total unearned income		$ (6)