Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-21-000041-index-headers.html | 2021-12-17 18:45:01 | |
| 0001733998-21-000041-index.html | 2021-12-17 18:45:01 | |
| 0001733998-21-000041.txt | 2021-12-17 18:45:01 | |
 0001733998-21-000041-xbrl.zip | 95956 | 2021-12-17 18:45:01 |
| FilingSummary.xml | 1830 | 2021-12-17 18:45:01 |
| Financial_Report.xlsx | 6005 | 2021-12-17 18:45:01 |
| MetaLinks.json | 22536 | 2021-12-17 18:45:01 |
| nwn-20211217.htm | 64290 | 2021-12-17 18:45:01 |
| nwn-20211217.xsd | 2951 | 2021-12-17 18:45:01 |
| nwn-20211217_def.xml | 16611 | 2021-12-17 18:45:01 |
 nwn-20211217_g1.jpg | 57055 | 2021-12-17 18:45:01 |
 nwn-20211217_g2.jpg | 38736 | 2021-12-17 18:45:01 |
| nwn-20211217_htm.xml | 20661 | 2021-12-17 18:45:01 |
| nwn-20211217_lab.xml | 32059 | 2021-12-17 18:45:01 |
| nwn-20211217_pre.xml | 16871 | 2021-12-17 18:45:01 |
| R1.htm | 45749 | 2021-12-17 18:45:01 |
| report.css | 2767 | 2021-12-17 18:45:01 |
| Show.js | 1085 | 2021-12-17 18:45:01 |