| SourceName | Taxonomy Technical Improvement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2019 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2018-10 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedLabels | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedDocumentation | true | http://fasb.org/srt/role/changeNote/changeNote |
| PreviousDocumentation | The number of productive developmental wells drilled in the geographic area. A productive well is a well that is not a dry well. The number of wells drilled refers to the number of wells (holes) completed at any time during the fiscal years, regardless when drilling was initiated. | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | SEC | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Regulation S-K (SK) | http://www.xbrl.org/2009/role/commonPracticeRef |
| Number | 229 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 1205 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | (a) | http://www.xbrl.org/2009/role/commonPracticeRef |
| Subparagraph | (2) | http://www.xbrl.org/2009/role/commonPracticeRef |