Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000110019-23-000014-index-headers.html | 2023-11-01 16:24:12 | |
| 0000110019-23-000014-index.html | 2023-11-01 16:24:12 | |
| 0000110019-23-000014.txt | 2023-11-01 16:24:12 | |
 0000110019-23-000014-xbrl.zip | 100928 | 2023-11-01 16:24:12 |
| FilingSummary.xml | 13542 | 2023-11-01 16:24:12 |
| Financial_Report.xlsx | 36859 | 2023-11-01 16:24:12 |
| MetaLinks.json | 344166 | 2023-11-01 16:24:12 |
| nwp-20230930.htm | 451614 | 2023-11-01 16:24:12 |
| nwp-20230930.xsd | 19657 | 2023-11-01 16:24:12 |
| nwp-20230930_cal.xml | 47361 | 2023-11-01 16:24:12 |
| nwp-20230930_def.xml | 139080 | 2023-11-01 16:24:12 |
| nwp-20230930_htm.xml | 207004 | 2023-11-01 16:24:12 |
| nwp-20230930_lab.xml | 274377 | 2023-11-01 16:24:12 |
| nwp-20230930_pre.xml | 168875 | 2023-11-01 16:24:12 |
| nwp_20230930xex-311.htm | 10151 | 2023-11-01 16:24:12 |
| nwp_20230930xex-312.htm | 10151 | 2023-11-01 16:24:12 |
| nwp_20230930xex-32.htm | 6532 | 2023-11-01 16:24:12 |
| R1.htm | 46813 | 2023-11-01 16:24:12 |
| R10.htm | 10365 | 2023-11-01 16:24:12 |
| R11.htm | 8130 | 2023-11-01 16:24:12 |
| R12.htm | 12016 | 2023-11-01 16:24:12 |
| R13.htm | 41554 | 2023-11-01 16:24:12 |
| R14.htm | 8081 | 2023-11-01 16:24:12 |
| R15.htm | 7941 | 2023-11-01 16:24:12 |
| R16.htm | 36904 | 2023-11-01 16:24:12 |
| R17.htm | 28029 | 2023-11-01 16:24:12 |
| R18.htm | 7287 | 2023-11-01 16:24:12 |
| R19.htm | 32268 | 2023-11-01 16:24:12 |
| R2.htm | 61256 | 2023-11-01 16:24:12 |
| R20.htm | 22618 | 2023-11-01 16:24:12 |
| R21.htm | 10226 | 2023-11-01 16:24:12 |
| R22.htm | 24541 | 2023-11-01 16:24:12 |
| R3.htm | 117608 | 2023-11-01 16:24:12 |
| R4.htm | 23363 | 2023-11-01 16:24:12 |
| R5.htm | 80777 | 2023-11-01 16:24:12 |
| R6.htm | 8160 | 2023-11-01 16:24:12 |
| R7.htm | 46729 | 2023-11-01 16:24:12 |
| R8.htm | 6286 | 2023-11-01 16:24:12 |
| R9.htm | 15892 | 2023-11-01 16:24:12 |
| report.css | 2767 | 2023-11-01 16:24:12 |
| Show.js | 1085 | 2023-11-01 16:24:12 |