Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000110019-24-000006-index-headers.html | 2024-05-06 16:20:13 | |
| 0000110019-24-000006-index.html | 2024-05-06 16:20:13 | |
| 0000110019-24-000006.txt | 2024-05-06 16:20:13 | |
 0000110019-24-000006-xbrl.zip | 96683 | 2024-05-06 16:20:13 |
| FilingSummary.xml | 14274 | 2024-05-06 16:20:13 |
| Financial_Report.xlsx | 34750 | 2024-05-06 16:20:13 |
| MetaLinks.json | 340308 | 2024-05-06 16:20:13 |
| nwp-20240331.htm | 392979 | 2024-05-06 16:20:13 |
| nwp-20240331.xsd | 18852 | 2024-05-06 16:20:13 |
| nwp-20240331_cal.xml | 45151 | 2024-05-06 16:20:13 |
| nwp-20240331_def.xml | 134884 | 2024-05-06 16:20:13 |
| nwp-20240331_htm.xml | 169824 | 2024-05-06 16:20:13 |
| nwp-20240331_lab.xml | 244860 | 2024-05-06 16:20:13 |
| nwp-20240331_pre.xml | 164110 | 2024-05-06 16:20:13 |
| nwp_20240331xex-311.htm | 10146 | 2024-05-06 16:20:13 |
| nwp_20240331xex-312.htm | 10146 | 2024-05-06 16:20:13 |
| nwp_20240331xex-32.htm | 6518 | 2024-05-06 16:20:13 |
| R1.htm | 46815 | 2024-05-06 16:20:13 |
| R10.htm | 9660 | 2024-05-06 16:20:13 |
| R11.htm | 8160 | 2024-05-06 16:20:13 |
| R12.htm | 11778 | 2024-05-06 16:20:13 |
| R13.htm | 33477 | 2024-05-06 16:20:13 |
| R14.htm | 7598 | 2024-05-06 16:20:13 |
| R15.htm | 7463 | 2024-05-06 16:20:13 |
| R16.htm | 33543 | 2024-05-06 16:20:13 |
| R17.htm | 28032 | 2024-05-06 16:20:13 |
| R18.htm | 7290 | 2024-05-06 16:20:13 |
| R19.htm | 31444 | 2024-05-06 16:20:13 |
| R2.htm | 57242 | 2024-05-06 16:20:13 |
| R20.htm | 19949 | 2024-05-06 16:20:13 |
| R21.htm | 10229 | 2024-05-06 16:20:13 |
| R22.htm | 22915 | 2024-05-06 16:20:13 |
| R3.htm | 117578 | 2024-05-06 16:20:13 |
| R4.htm | 20420 | 2024-05-06 16:20:13 |
| R5.htm | 75577 | 2024-05-06 16:20:13 |
| R6.htm | 8163 | 2024-05-06 16:20:13 |
| R7.htm | 38648 | 2024-05-06 16:20:13 |
| R8.htm | 5934 | 2024-05-06 16:20:13 |
| R9.htm | 15888 | 2024-05-06 16:20:13 |
| report.css | 2767 | 2024-05-06 16:20:13 |
| Show.js | 1085 | 2024-05-06 16:20:13 |