Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-21-000021-index-headers.html | 2021-08-04 18:17:36 | |
| 0001733998-21-000021-index.html | 2021-08-04 18:17:36 | |
| 0001733998-21-000021.txt | 2021-08-04 18:17:36 | |
 0001733998-21-000021-xbrl.zip | 115471 | 2021-08-04 18:17:36 |
| a2021q2ex991pressreleasedo.htm | 322950 | 2021-08-04 18:17:36 |
| FilingSummary.xml | 1878 | 2021-08-04 18:17:36 |
| Financial_Report.xlsx | 6007 | 2021-08-04 18:17:36 |
| MetaLinks.json | 22790 | 2021-08-04 18:17:36 |
| nwn-20210805.htm | 68060 | 2021-08-04 18:17:36 |
| nwn-20210805.xsd | 2951 | 2021-08-04 18:17:36 |
| nwn-20210805_def.xml | 16611 | 2021-08-04 18:17:36 |
 nwn-20210805_g1.jpg | 57055 | 2021-08-04 18:17:36 |
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| nwn-20210805_htm.xml | 20483 | 2021-08-04 18:17:36 |
| nwn-20210805_lab.xml | 32059 | 2021-08-04 18:17:36 |
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 nwnholdingslogohza26.jpg | 64564 | 2021-08-04 18:17:36 |
| R1.htm | 45752 | 2021-08-04 18:17:36 |
| report.css | 2767 | 2021-08-04 18:17:36 |
| Show.js | 1085 | 2021-08-04 18:17:36 |