Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-20-000066-index-headers.html | 2020-12-18 19:50:15 | |
| 0001733998-20-000066-index.html | 2020-12-18 19:50:15 | |
| 0001733998-20-000066.txt | 2020-12-18 19:50:15 | |
 0001733998-20-000066-xbrl.zip | 97102 | 2020-12-18 19:50:15 |
| FilingSummary.xml | 1867 | 2020-12-18 19:50:15 |
| Financial_Report.xlsx | 5781 | 2020-12-18 19:50:15 |
| MetaLinks.json | 22874 | 2020-12-18 19:50:15 |
| nwn-20201218.htm | 64810 | 2020-12-18 19:50:15 |
| nwn-20201218.xsd | 3205 | 2020-12-18 19:50:15 |
| nwn-20201218_cal.xml | 804 | 2020-12-18 19:50:15 |
| nwn-20201218_def.xml | 16611 | 2020-12-18 19:50:15 |
 nwn-20201218_g1.jpg | 57055 | 2020-12-18 19:50:15 |
 nwn-20201218_g2.jpg | 38736 | 2020-12-18 19:50:15 |
| nwn-20201218_htm.xml | 20723 | 2020-12-18 19:50:15 |
| nwn-20201218_lab.xml | 32059 | 2020-12-18 19:50:15 |
| nwn-20201218_pre.xml | 16871 | 2020-12-18 19:50:15 |
| R1.htm | 45750 | 2020-12-18 19:50:15 |
| report.css | 2767 | 2020-12-18 19:50:15 |
| Show.js | 1085 | 2020-12-18 19:50:15 |