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Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Capitalized Contract Cost [Line Items] |  |
Current contract assets | $ 1,000 | $ 600
Non-current contract assets | 0 | 0
Current contract liabilities | 947 | 741
Non-current contract liabilities | 200 | 300
Revenue recognized included in contract liabilities | 500 |
Current capitalized costs | 130 | 85
Non-current capitalized costs | 0 | 0
Incremental costs amortized | 332 | 235
Impairment related to costs capitalized | $ 0 | 0
Payment 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] |  |
Payment terms | 90 days |
TS |  |
Capitalized Contract Cost [Line Items] |  |
Current capitalized costs | $ 13 | 47
Non-current capitalized costs | 22 | 0
Incremental costs amortized | 13 | 13
Impairment related to costs capitalized | $ 0 | $ 0

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