Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-22-003450-index-headers.html | 2022-03-11 17:18:26 | |
| 0001558370-22-003450-index.html | 2022-03-11 17:18:26 | |
| 0001558370-22-003450.txt | 2022-03-11 17:18:26 | |
 0001558370-22-003450-xbrl.zip | 535169 | 2022-03-11 17:18:26 |
| FilingSummary.xml | 48223 | 2022-03-11 17:18:26 |
| Financial_Report.xlsx | 151571 | 2022-03-11 17:18:26 |
| MetaLinks.json | 764030 | 2022-03-11 17:18:26 |
| nen-20211231.xsd | 102012 | 2022-03-11 17:18:26 |
| nen-20211231x10k.htm | 5294259 | 2022-03-11 17:18:26 |
 nen-20211231x10k004.jpg | 51926 | 2022-03-11 17:18:26 |
| nen-20211231x10k_htm.xml | 5047624 | 2022-03-11 17:18:26 |
| nen-20211231xex31d1.htm | 12497 | 2022-03-11 17:18:26 |
| nen-20211231xex31d2.htm | 12926 | 2022-03-11 17:18:26 |
| nen-20211231xex32d1.htm | 15088 | 2022-03-11 17:18:26 |
| nen-20211231xex99d1.htm | 360517 | 2022-03-11 17:18:26 |
| nen-20211231_cal.xml | 46819 | 2022-03-11 17:18:26 |
| nen-20211231_def.xml | 456548 | 2022-03-11 17:18:26 |
| nen-20211231_lab.xml | 654842 | 2022-03-11 17:18:26 |
| nen-20211231_pre.xml | 665258 | 2022-03-11 17:18:26 |
| R1.htm | 70869 | 2022-03-11 17:18:26 |
| R10.htm | 5716 | 2022-03-11 17:18:26 |
| R11.htm | 68581 | 2022-03-11 17:18:26 |
| R12.htm | 5029 | 2022-03-11 17:18:26 |
| R13.htm | 19818 | 2022-03-11 17:18:26 |
| R14.htm | 13842 | 2022-03-11 17:18:26 |
| R15.htm | 5850 | 2022-03-11 17:18:26 |
| R16.htm | 63622 | 2022-03-11 17:18:26 |
| R17.htm | 5947 | 2022-03-11 17:18:26 |
| R18.htm | 29550 | 2022-03-11 17:18:26 |
| R19.htm | 40634 | 2022-03-11 17:18:26 |
| R2.htm | 55831 | 2022-03-11 17:18:26 |
| R20.htm | 983231 | 2022-03-11 17:18:26 |
| R21.htm | 9673 | 2022-03-11 17:18:26 |
| R22.htm | 14870 | 2022-03-11 17:18:26 |
| R23.htm | 86355 | 2022-03-11 17:18:26 |
| R24.htm | 10415 | 2022-03-11 17:18:26 |
| R25.htm | 68376 | 2022-03-11 17:18:26 |
| R26.htm | 380920 | 2022-03-11 17:18:26 |
| R27.htm | 17029 | 2022-03-11 17:18:26 |
| R28.htm | 15065 | 2022-03-11 17:18:26 |
| R29.htm | 10561 | 2022-03-11 17:18:26 |
| R3.htm | 5327 | 2022-03-11 17:18:26 |
| R30.htm | 63044 | 2022-03-11 17:18:26 |
| R31.htm | 21988 | 2022-03-11 17:18:26 |
| R32.htm | 34533 | 2022-03-11 17:18:26 |
| R33.htm | 1150239 | 2022-03-11 17:18:26 |
| R34.htm | 85826 | 2022-03-11 17:18:26 |
| R35.htm | 49279 | 2022-03-11 17:18:26 |
| R36.htm | 45151 | 2022-03-11 17:18:26 |
| R37.htm | 83731 | 2022-03-11 17:18:26 |
| R38.htm | 93992 | 2022-03-11 17:18:26 |
| R39.htm | 271440 | 2022-03-11 17:18:26 |
| R4.htm | 72171 | 2022-03-11 17:18:26 |
| R40.htm | 26842 | 2022-03-11 17:18:26 |
| R41.htm | 70940 | 2022-03-11 17:18:26 |
| R42.htm | 14926 | 2022-03-11 17:18:26 |
| R43.htm | 84472 | 2022-03-11 17:18:26 |
| R44.htm | 16236 | 2022-03-11 17:18:26 |
| R45.htm | 45957 | 2022-03-11 17:18:26 |
| R46.htm | 20240 | 2022-03-11 17:18:26 |
| R47.htm | 42574 | 2022-03-11 17:18:26 |
| R48.htm | 69169 | 2022-03-11 17:18:26 |
| R49.htm | 83543 | 2022-03-11 17:18:26 |
| R5.htm | 56135 | 2022-03-11 17:18:26 |
| R50.htm | 7683 | 2022-03-11 17:18:26 |
| R51.htm | 62071 | 2022-03-11 17:18:26 |
| R52.htm | 53348 | 2022-03-11 17:18:26 |
| R53.htm | 26308 | 2022-03-11 17:18:26 |
| R54.htm | 10158 | 2022-03-11 17:18:26 |
| R55.htm | 29773 | 2022-03-11 17:18:26 |
| R56.htm | 7624 | 2022-03-11 17:18:26 |
| R57.htm | 11044 | 2022-03-11 17:18:26 |
| R58.htm | 15003 | 2022-03-11 17:18:26 |
| R59.htm | 39626 | 2022-03-11 17:18:26 |
| R6.htm | 80566 | 2022-03-11 17:18:26 |
| R60.htm | 21290 | 2022-03-11 17:18:26 |
| R61.htm | 47986 | 2022-03-11 17:18:26 |
| R62.htm | 45060 | 2022-03-11 17:18:26 |
| R63.htm | 74530 | 2022-03-11 17:18:26 |
| R64.htm | 41041 | 2022-03-11 17:18:26 |
| R65.htm | 57259 | 2022-03-11 17:18:26 |
| R66.htm | 58780 | 2022-03-11 17:18:26 |
| R67.htm | 44111 | 2022-03-11 17:18:26 |
| R68.htm | 228756 | 2022-03-11 17:18:26 |
| R69.htm | 297052 | 2022-03-11 17:18:26 |
| R7.htm | 31033 | 2022-03-11 17:18:26 |
| R70.htm | 53223 | 2022-03-11 17:18:26 |
| R71.htm | 16597 | 2022-03-11 17:18:26 |
| R72.htm | 38422 | 2022-03-11 17:18:26 |
| R73.htm | 42997 | 2022-03-11 17:18:26 |
| R74.htm | 10636 | 2022-03-11 17:18:26 |
| R8.htm | 385785 | 2022-03-11 17:18:26 |
| R9.htm | 10610 | 2022-03-11 17:18:26 |
| report.css | 2767 | 2022-03-11 17:18:26 |
| Show.js | 1085 | 2022-03-11 17:18:26 |