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Financing Receivables (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
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Accounts Notes And Loans Receivable [Line Items] |  |
Total financing receivables | $ 3,472 | $ 11,179
Total unearned income | (55) | (332)
Total financing receivables, net of unearned income | 3,417 | 10,847
Allowance for doubtful promissory notes | 0 | (1,849)
Less current portion | (3,233) | (4,258)
Non-current financing receivables | 184 | 4,740
Promissory Notes |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total financing receivables | 780 | 5,646
Total unearned income |  | (95)
Sales Type Lease |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total financing receivables | 2,692 | 5,533
Total unearned income | $ (55) | $ (237)

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