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Accounts and Long Term Receivable (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Accounts receivable | $ 12,840 |  | $ 12,840 |  | $ 15,114
Long-term receivable | 5,151 |  | $ 5,151 |  | $ 5,328
Minimum |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Maturity term of accounts and long term receivables |  |  | 1 year |  | 1 year
Financing receivables |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Accounts receivable | 1,900 |  | $ 1,900 |  | $ 2,100
Long term receivable - financing component | $ 4,900 |  | $ 4,900 |  | 5,000
Long term receivables interest rate | 6.90% |  | 6.90% |  |
Amount of allowance for credit losses or impairments with a contractual maturity of over one year | $ 0 |  | $ 0 |  |
Accounts and long-term receivable past due | 0 |  | 0 |  | 0
Activity in allowance for credit losses for accounts and long-term receivables | 0 | $ 0 | $ 0 | $ 0 |
Contract Receivable, Fiscal Year Maturity [Abstract] |  |  |  |  |
2020 (remaining 6 months) |  |  |  |  | 2,024
2021 |  |  |  |  | 2,258
2022 |  |  |  |  | 1,880
2023 |  |  |  |  | 1,423
Total payments |  |  |  |  | 7,585
Less: unearned income |  |  |  |  | 747
Total, net of unearned income |  |  |  |  | $ 6,838
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 | $ 114 | $ 1 | $ 230 | $ 1 |

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