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| 0001104485-11-000041-index.html | 2011-08-09 06:35:19 | |
| 0001104485-11-000041.txt | 2011-08-09 06:35:19 | |
 0001104485-11-000041-xbrl.zip | 64403 | 2011-08-09 06:35:19 |
| exhibit311_06302011.htm | 15656 | 2011-08-09 06:35:19 |
| exhibit312_06302011.htm | 15381 | 2011-08-09 06:35:19 |
| exhibit321_06302011.htm | 10573 | 2011-08-09 06:35:19 |
| FilingSummary.xml | 10431 | 2011-08-09 06:35:19 |
| Financial_Report.xls | 345810 | 2011-08-09 06:35:19 |
| form10q_06302011.htm | 1148860 | 2011-08-09 06:35:19 |
| nog-20110630.xml | 372462 | 2011-08-09 06:35:19 |
| nog-20110630.xsd | 16591 | 2011-08-09 06:35:19 |
| nog-20110630_cal.xml | 50867 | 2011-08-09 06:35:19 |
| nog-20110630_lab.xml | 188179 | 2011-08-09 06:35:19 |
| nog-20110630_pre.xml | 103693 | 2011-08-09 06:35:19 |
| R1.htm | 33019 | 2011-08-09 06:35:19 |
| R10.htm | 20909 | 2011-08-09 06:35:19 |
| R11.htm | 11418 | 2011-08-09 06:35:19 |
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| R2.htm | 143367 | 2011-08-09 06:35:19 |
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| R7.htm | 63584 | 2011-08-09 06:35:19 |
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| R9.htm | 16061 | 2011-08-09 06:35:19 |
| report.css | 2721 | 2011-08-09 06:35:19 |
| Show.js | 6423 | 2011-08-09 06:35:19 |