Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-22-000027-index-headers.html | 2022-08-03 18:11:16 | |
| 0001733998-22-000027-index.html | 2022-08-03 18:11:16 | |
| 0001733998-22-000027.txt | 2022-08-03 18:11:16 | |
 0001733998-22-000027-xbrl.zip | 115954 | 2022-08-03 18:11:16 |
| a2022q2ex991pressreleasedo.htm | 322700 | 2022-08-03 18:11:16 |
| FilingSummary.xml | 1883 | 2022-08-03 18:11:16 |
| Financial_Report.xlsx | 6038 | 2022-08-03 18:11:16 |
| MetaLinks.json | 22186 | 2022-08-03 18:11:16 |
| nwn-20220804.htm | 68176 | 2022-08-03 18:11:16 |
| nwn-20220804.xsd | 2939 | 2022-08-03 18:11:16 |
| nwn-20220804_def.xml | 16431 | 2022-08-03 18:11:16 |
 nwn-20220804_g1.jpg | 57055 | 2022-08-03 18:11:16 |
 nwn-20220804_g2.jpg | 38736 | 2022-08-03 18:11:16 |
| nwn-20220804_htm.xml | 20629 | 2022-08-03 18:11:16 |
| nwn-20220804_lab.xml | 31891 | 2022-08-03 18:11:16 |
| nwn-20220804_pre.xml | 16703 | 2022-08-03 18:11:16 |
 nwnholdingslogohza26a.jpg | 64564 | 2022-08-03 18:11:16 |
| R1.htm | 45661 | 2022-08-03 18:11:16 |
| report.css | 2767 | 2022-08-03 18:11:16 |
| Show.js | 1085 | 2022-08-03 18:11:16 |