Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-25-025720-index-headers.html | 2025-08-08 16:08:29 | |
| 0001437749-25-025720-index.html | 2025-08-08 16:08:29 | |
| 0001437749-25-025720.txt | 2025-08-08 16:08:29 | |
 0001437749-25-025720-xbrl.zip | 150905 | 2025-08-08 16:08:29 |
| ex_812617.htm | 13696 | 2025-08-08 16:08:29 |
| ex_812618.htm | 13744 | 2025-08-08 16:08:29 |
| ex_812619.htm | 4976 | 2025-08-08 16:08:29 |
| ex_812620.htm | 4957 | 2025-08-08 16:08:29 |
| FilingSummary.xml | 35098 | 2025-08-08 16:08:29 |
| MetaLinks.json | 761253 | 2025-08-08 16:08:29 |
| nwpx-20250630.xsd | 50482 | 2025-08-08 16:08:29 |
| nwpx-20250630_cal.xml | 48859 | 2025-08-08 16:08:29 |
| nwpx-20250630_def.xml | 317042 | 2025-08-08 16:08:29 |
| nwpx-20250630_lab.xml | 302809 | 2025-08-08 16:08:29 |
| nwpx-20250630_pre.xml | 352660 | 2025-08-08 16:08:29 |
| nwpx20250630_10q.htm | 1332687 | 2025-08-08 16:08:29 |
| nwpx20250630_10q_htm.xml | 1060302 | 2025-08-08 16:08:29 |
| R1.htm | 51804 | 2025-08-08 16:08:29 |
| R10.htm | 14922 | 2025-08-08 16:08:29 |
| R11.htm | 85828 | 2025-08-08 16:08:29 |
| R12.htm | 69949 | 2025-08-08 16:08:29 |
| R13.htm | 15048 | 2025-08-08 16:08:29 |
| R14.htm | 37835 | 2025-08-08 16:08:29 |
| R15.htm | 16467 | 2025-08-08 16:08:29 |
| R16.htm | 57594 | 2025-08-08 16:08:29 |
| R17.htm | 12303 | 2025-08-08 16:08:29 |
| R18.htm | 37464 | 2025-08-08 16:08:29 |
| R19.htm | 57058 | 2025-08-08 16:08:29 |
| R2.htm | 86382 | 2025-08-08 16:08:29 |
| R20.htm | 18042 | 2025-08-08 16:08:29 |
| R21.htm | 21213 | 2025-08-08 16:08:29 |
| R22.htm | 13875 | 2025-08-08 16:08:29 |
| R23.htm | 84858 | 2025-08-08 16:08:29 |
| R24.htm | 59744 | 2025-08-08 16:08:29 |
| R25.htm | 29455 | 2025-08-08 16:08:29 |
| R26.htm | 47063 | 2025-08-08 16:08:29 |
| R27.htm | 33109 | 2025-08-08 16:08:29 |
| R28.htm | 43508 | 2025-08-08 16:08:29 |
| R29.htm | 5200 | 2025-08-08 16:08:29 |
| R3.htm | 37380 | 2025-08-08 16:08:29 |
| R30.htm | 12824 | 2025-08-08 16:08:29 |
| R31.htm | 3203 | 2025-08-08 16:08:29 |
| R32.htm | 12671 | 2025-08-08 16:08:29 |
| R33.htm | 5136 | 2025-08-08 16:08:29 |
| R34.htm | 14973 | 2025-08-08 16:08:29 |
| R35.htm | 59907 | 2025-08-08 16:08:29 |
| R36.htm | 5028 | 2025-08-08 16:08:29 |
| R37.htm | 10050 | 2025-08-08 16:08:29 |
| R38.htm | 12095 | 2025-08-08 16:08:29 |
| R39.htm | 52509 | 2025-08-08 16:08:29 |
| R4.htm | 126382 | 2025-08-08 16:08:29 |
| R40.htm | 21457 | 2025-08-08 16:08:29 |
| R41.htm | 32360 | 2025-08-08 16:08:29 |
| R42.htm | 7484 | 2025-08-08 16:08:29 |
| R43.htm | 18491 | 2025-08-08 16:08:29 |
| R44.htm | 15496 | 2025-08-08 16:08:29 |
| R45.htm | 7943 | 2025-08-08 16:08:29 |
| R46.htm | 8594 | 2025-08-08 16:08:29 |
| R47.htm | 10785 | 2025-08-08 16:08:29 |
| R48.htm | 24020 | 2025-08-08 16:08:29 |
| R49.htm | 5346 | 2025-08-08 16:08:29 |
| R5.htm | 26672 | 2025-08-08 16:08:29 |
| R50.htm | 3563 | 2025-08-08 16:08:29 |
| R51.htm | 41580 | 2025-08-08 16:08:29 |
| R52.htm | 8136 | 2025-08-08 16:08:29 |
| R53.htm | 27623 | 2025-08-08 16:08:29 |
| R6.htm | 95250 | 2025-08-08 16:08:29 |
| R7.htm | 11415 | 2025-08-08 16:08:29 |
| R8.htm | 93280 | 2025-08-08 16:08:29 |
| R9.htm | 14196 | 2025-08-08 16:08:29 |
| report.css | 2767 | 2025-08-08 16:08:29 |
| Show.js | 1085 | 2025-08-08 16:08:29 |