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v3.21.2

Risks and Uncertainties - Additional Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) Customer | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) Customer | Jun. 30, 2020 USD ($)
Concentration Risk [Line Items] |  |  |  |
Unbilled receivables current | $ 1,561 |  | $ 1,561 |
Revenue | 17,679 | $ 6,975 | 66,005 | $ 25,575
Customer |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Proceeds from accounts receivables |  |  | 5,500 |
Proceeds from financing receivables |  |  | 6,100 |
Unbilled receivables current | $ 1,600 |  | $ 1,600 |
Number of customers | Customer | 3 |  | 3 |
Revenue | Customer |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Number of customers | Customer | 3 |  | 3 |
Revenue | Customer | Unbilled Receivables |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Revenue | $ 1,000 |  | $ 9,900 |
Revenue | Trade Accounts Receivables | Customer |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Revenue | 4,500 |  | 17,300 |
Revenue | Financing Receivables | Customer |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Revenue | $ 400 |  | $ 13,200 |

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