Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000073020-21-000003-index-headers.html | 2021-11-15 16:47:32 | |
| 0000073020-21-000003-index.html | 2021-11-15 16:47:32 | |
| 0000073020-21-000003.txt | 2021-11-15 16:47:32 | |
 0000073020-21-000003-xbrl.zip | 50167 | 2021-11-15 16:47:32 |
| ex5a-companymtntakedownopi.htm | 7485 | 2021-11-15 16:47:32 |
| ex5b-mlbmtntakedownopinion.htm | 6665 | 2021-11-15 16:47:32 |
| FilingSummary.xml | 1889 | 2021-11-15 16:47:32 |
| Financial_Report.xlsx | 5589 | 2021-11-15 16:47:32 |
| MetaLinks.json | 18688 | 2021-11-15 16:47:32 |
| nwn-20211115.htm | 41718 | 2021-11-15 16:47:32 |
| nwn-20211115.xsd | 2537 | 2021-11-15 16:47:32 |
| nwn-20211115_def.xml | 13336 | 2021-11-15 16:47:32 |
 nwn-20211115_g1.jpg | 38736 | 2021-11-15 16:47:32 |
| nwn-20211115_htm.xml | 12422 | 2021-11-15 16:47:32 |
| nwn-20211115_lab.xml | 26077 | 2021-11-15 16:47:32 |
| nwn-20211115_pre.xml | 13711 | 2021-11-15 16:47:32 |
| R1.htm | 34085 | 2021-11-15 16:47:32 |
| report.css | 2767 | 2021-11-15 16:47:32 |
| Show.js | 1085 | 2021-11-15 16:47:32 |