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Transactions with Related Parties - Narrative (Details) - USD ($) |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 01, 2020 | Jul. 01, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2020
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable – related parties |  |  | $ 1,995,000 |  | $ 55,000
Employee Awards |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable – related parties |  |  | 1,600,000 |  |
Accounts payable, tax withholding, share-based payment arrangement |  |  | 1,600,000 |  |
Affiliated Entity | Contract Services Agreement | Combo Resources, LLC |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Monthly servicing fee | $ 100,000 | $ 150,000 | 100,000 | $ 250,000 |
Accounts receivable – related parties |  |  | 400,000 |  | 100,000
Affiliated Entity | Contract Services Agreement | Riley Exploration Group, Inc |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Monthly servicing fee |  |  | 100,000 |  |
Accounts receivable – related parties |  |  | $ 0 |  | $ 0

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