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