Accounts Receivable Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restricted cash	$ 334	$ 108
Certain Receivables to Unrelated Third-parties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable agreement, percent of sold receivables advanced	90.00%
Accounts receivable agreement, reserve of sold receivables, percent	10.00%
Accounts receivable agreement, percent of sold receivables advanced, deduction	1.60%
Sale of receivables, maximum limit of receivables uncollected	$ 3,500
Proceeds from collection of finance receivables	18,300
Certain Receivables to Unrelated Third-parties | Other Nonoperating Income (Expense)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost of selling receivables	200
Uncollectible Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Thirty party financial institution reserve	$ (2,100)