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Revenue - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Oct. 01, 2018 | Sep. 30, 2018
Capitalized Contract Cost [Line Items] |  |  |  |
Managed service contracts, right to refund, period |  | 30 days |  |
Current contract assets | $ 600 | $ 600 | $ 1,100 |
Non-current contract assets | 0 | 0 | 0 |
Current contract liabilities | 791 | 791 | 900 | $ 1,197
Revenue recognized included in contract liabilities |  | 700 |  |
Non-current contract liabilities | 0 | 0 | 0 |
Current capitalized costs | 54 | 54 | 71 |
Non-current capitalized costs | 0 | 0 | 0 |
Incremental costs amortized | 66 | 174 |  |
Impairment related to incremental costs capitalized | 0 | $ 0 |  |
Payments terms |  | 30 days |  |
Practical Expedient, Incremental Costs |  | true |  |
Practical Expedient, Financing Component |  | true |  |
Remaining Performance Obligation, Optional Exemption |  | true |  |
Europe |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Payments terms |  | 90 days |  |
Total |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Current capitalized costs | 48 | $ 48 | 60 |
Non-current capitalized costs | 0 | 0 | $ 0 |
Incremental costs amortized | 1 | 9 |  |
Impairment related to incremental costs capitalized | $ 0 | $ 0 |  |

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