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| 0000277375-16-000286-index.html | 2016-05-06 10:48:20 | |
| 0000277375-16-000286.txt | 2016-05-06 10:48:20 | |
 0000277375-16-000286-xbrl.zip | 106931 | 2016-05-06 10:48:20 |
| dgas-20160331.xml | 680172 | 2016-05-06 10:48:20 |
| dgas-20160331.xsd | 28689 | 2016-05-06 10:48:20 |
| dgas-20160331x10q.htm | 727684 | 2016-05-06 10:48:20 |
| dgas-20160331x10qxex311.htm | 13829 | 2016-05-06 10:48:20 |
| dgas-20160331x10qxex312.htm | 13805 | 2016-05-06 10:48:20 |
| dgas-20160331x10qxex321.htm | 8056 | 2016-05-06 10:48:20 |
| dgas-20160331x10qxex322.htm | 8039 | 2016-05-06 10:48:20 |
| dgas-20160331_cal.xml | 55813 | 2016-05-06 10:48:20 |
| dgas-20160331_def.xml | 129185 | 2016-05-06 10:48:20 |
| dgas-20160331_lab.xml | 380548 | 2016-05-06 10:48:20 |
| dgas-20160331_pre.xml | 226801 | 2016-05-06 10:48:20 |
| FilingSummary.xml | 20166 | 2016-05-06 10:48:20 |
| Financial_Report.xlsx | 40979 | 2016-05-06 10:48:20 |
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| report.css | 2767 | 2016-05-06 10:48:20 |
| Show.js | 1410 | 2016-05-06 10:48:20 |