Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-22-000010-index-headers.html | 2022-05-03 18:46:35 | |
| 0001733998-22-000010-index.html | 2022-05-03 18:46:35 | |
| 0001733998-22-000010.txt | 2022-05-03 18:46:35 | |
 0001733998-22-000010-xbrl.zip | 113829 | 2022-05-03 18:46:35 |
| a2022q1ex991pressreleasedo.htm | 269740 | 2022-05-03 18:46:35 |
| FilingSummary.xml | 1889 | 2022-05-03 18:46:35 |
| Financial_Report.xlsx | 6005 | 2022-05-03 18:46:35 |
| MetaLinks.json | 22536 | 2022-05-03 18:46:35 |
| nwn-20220504.htm | 67672 | 2022-05-03 18:46:35 |
| nwn-20220504.xsd | 2951 | 2022-05-03 18:46:35 |
| nwn-20220504_def.xml | 16611 | 2022-05-03 18:46:35 |
 nwn-20220504_g1.jpg | 57055 | 2022-05-03 18:46:35 |
 nwn-20220504_g2.jpg | 38736 | 2022-05-03 18:46:35 |
| nwn-20220504_htm.xml | 20635 | 2022-05-03 18:46:35 |
| nwn-20220504_lab.xml | 32059 | 2022-05-03 18:46:35 |
| nwn-20220504_pre.xml | 16871 | 2022-05-03 18:46:35 |
 nwnholdingslogohza26.jpg | 64564 | 2022-05-03 18:46:35 |
| R1.htm | 45995 | 2022-05-03 18:46:35 |
| report.css | 2767 | 2022-05-03 18:46:35 |
| Show.js | 1085 | 2022-05-03 18:46:35 |