Accounts and Financing Receivables - Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Accounts Notes And Loans Receivable [Line Items]
Total financing receivables	$ 7,896	$ 184
Total unearned income	(6)
Total financing receivables, net of unearned income	7,890	184
Less current portion	(4,952)	(184)
Non-current notes receivable	2,938
Promissory Notes
Accounts Notes And Loans Receivable [Line Items]
Total financing receivables	5,432	$ 184
Sales-type Lease
Accounts Notes And Loans Receivable [Line Items]
Total financing receivables	2,464
Total unearned income	$ (6)