IndexDisclosure of Certain Methane Gas Reserves (Deprecated 2018-01-31)
| Name | DisclosureOfCertainMethaneGasReserves |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
Labels
| Text | Lang | Role | Container role |
|---|---|---|---|
| Description of the risks attendant with any future change to existing Federal tax policy related to methane gas reserves that are deemed to be economically producible only as a consequence of existing Federal tax incentives. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Disclosure of Certain Methane Gas Reserves (Deprecated 2018-01-31) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |