Accounts Receivable Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restricted cash	$ 108	$ 352
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, percent of sold receivables advanced, deduction	1.60%
Accounts receivable agreement, reserve of sold receivables, percent	10.00%
Sale of receivables, maximum limit of receivables uncollected	$ 3,500
Proceeds from collection of finance receivables	18,900
Certain Receivables to Unrelated Third-parties | Other Nonoperating Income (Expense)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cost of selling receivables	$ 300
Certain Receivables to Unrelated Third-parties | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, cost of sales, percent	1.00%
Certain Receivables to Unrelated Third-parties | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, cost of sales, percent	1.80%
Uncollectible Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sale of receivables, maximum limit of receivables uncollected	$ 600