Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000110019-18-000009-index-headers.html | 2018-08-02 08:58:09 | |
| 0000110019-18-000009-index.html | 2018-08-02 08:58:09 | |
| 0000110019-18-000009.txt | 2018-08-02 08:58:09 | |
 0000110019-18-000009-xbrl.zip | 80964 | 2018-08-02 08:58:09 |
| FilingSummary.xml | 12512 | 2018-08-02 08:58:09 |
| Financial_Report.xlsx | 33818 | 2018-08-02 08:58:09 |
| nwp-20180630.xml | 177046 | 2018-08-02 08:58:09 |
| nwp-20180630.xsd | 20875 | 2018-08-02 08:58:09 |
| nwp-20180630_cal.xml | 56361 | 2018-08-02 08:58:09 |
| nwp-20180630_def.xml | 86817 | 2018-08-02 08:58:09 |
| nwp-20180630_lab.xml | 310063 | 2018-08-02 08:58:09 |
| nwp-20180630_pre.xml | 165198 | 2018-08-02 08:58:09 |
| nwp_20180630x10q.htm | 437822 | 2018-08-02 08:58:09 |
| nwp_20180630xex-311.htm | 12719 | 2018-08-02 08:58:09 |
| nwp_20180630xex-312.htm | 13066 | 2018-08-02 08:58:09 |
| nwp_20180630xex-32.htm | 7791 | 2018-08-02 08:58:09 |
| R1.htm | 20506 | 2018-08-02 08:58:09 |
| R10.htm | 10812 | 2018-08-02 08:58:09 |
| R11.htm | 26798 | 2018-08-02 08:58:09 |
| R12.htm | 14071 | 2018-08-02 08:58:09 |
| R13.htm | 14055 | 2018-08-02 08:58:09 |
| R14.htm | 23146 | 2018-08-02 08:58:09 |
| R15.htm | 15466 | 2018-08-02 08:58:09 |
| R16.htm | 21432 | 2018-08-02 08:58:09 |
| R17.htm | 21513 | 2018-08-02 08:58:09 |
| R18.htm | 9576 | 2018-08-02 08:58:09 |
| R19.htm | 19619 | 2018-08-02 08:58:09 |
| R2.htm | 50807 | 2018-08-02 08:58:09 |
| R20.htm | 25508 | 2018-08-02 08:58:09 |
| R3.htm | 96896 | 2018-08-02 08:58:09 |
| R4.htm | 81433 | 2018-08-02 08:58:09 |
| R5.htm | 15360 | 2018-08-02 08:58:09 |
| R6.htm | 12075 | 2018-08-02 08:58:09 |
| R7.htm | 11681 | 2018-08-02 08:58:09 |
| R8.htm | 9592 | 2018-08-02 08:58:09 |
| R9.htm | 8200 | 2018-08-02 08:58:09 |
| report.css | 2767 | 2018-08-02 08:58:09 |
| Show.js | 1410 | 2018-08-02 08:58:09 |