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Revenue - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019
Capitalized Contract Cost [Line Items] |  |
Current contract assets | $ 1,000 | $ 600
Non-current contract assets | 0 | 0
Current contract liabilities | 1,433 | 741
Non-current contract liabilities | 300 | 300
Revenue recognized included in contract liabilities |  | 300
Current capitalized costs | 84 | 85
Non-current capitalized costs | 0 | 0
Incremental costs amortized | 78 |
Impairment related to incremental costs capitalized | $ 0 |
Payments terms | 30 days |
Practical Expedient, Incremental Costs | true |
Practical Expedient, Financing Component | true |
Remaining Performance Obligation, Optional Exemption | true |
Minimum |  |
Capitalized Contract Cost [Line Items] |  |
Amortization Period | 3 years |
Maximum |  |
Capitalized Contract Cost [Line Items] |  |
Amortization Period | 6 years |
Europe | Maximum |  |
Capitalized Contract Cost [Line Items] |  |
Payments terms | 90 days |
TS |  |
Capitalized Contract Cost [Line Items] |  |
Current capitalized costs | $ 13 | 47
Non-current capitalized costs | 31 | $ 0
Incremental costs amortized | 3 |
Impairment related to incremental costs capitalized | $ 0 |

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