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Commitments and Contingencies (Tables)
 12 Months Ended
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Volumetric and Pipeline and Storage Capacity Obligations The table below details the volumetric obligations as of September 30, 2020 for the remainder of the contract period. The current asset management contract was renewed in July 2020 for a one year period which will expire in March 2022. The contract was renewed at essentially the same terms and conditions as the prior agreement, except the utilization fee retained by Roanoke Gas was reduced.
YearNatural Gas Contracts
(In DTHs)
2020-20212,090,972 
2021-2022295,866 
Total2,386,838 
The table below details the pipeline and storage capacity commitments as of September 30, 2020 for the remainder of the contract period.
YearPipeline and
Storage Capacity
2020-2021$11,048,798 
2021-202210,284,092 
2022-20237,403,271 
2023-20245,743,826 
2024-20253,167,937 
Thereafter888,426 
Total$38,536,350