Accounts and Long Term Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 12,122		$ 13,362
Long-term receivable	$ 3,542		3,642
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity term of accounts and long term receivables	1 year
Financing receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 2,400		2,300
Long-term receivable	$ 3,400		3,500
Long term receivables interest rate	6.20%
Amount of allowance for credit losses or impairments with a contractual maturity of over one year	$ 0
Accounts and long-term receivable past due	0		0
Activity in allowance for credit losses for accounts and long-term receivables	$ 0	$ 0
Contract Receivable, Fiscal Year Maturity [Abstract]
2021			2,564
2022			2,300
2023			1,423
Total payments			6,287
Less: unearned income			469
Total, net of unearned income			$ 5,818
Financing receivables | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity term of accounts and long term receivables	1 year
Financing receivables | Other Income
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts And Long Term Receivable, Interest Income	$ 92	$ 116