Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-19-001912-index-headers.html | 2019-03-13 13:44:23 | |
| 0001558370-19-001912-index.html | 2019-03-13 13:44:23 | |
| 0001558370-19-001912.txt | 2019-03-13 13:44:23 | |
 0001558370-19-001912-xbrl.zip | 313768 | 2019-03-13 13:44:23 |
| FilingSummary.xml | 48194 | 2019-03-13 13:44:23 |
| Financial_Report.xlsx | 135041 | 2019-03-13 13:44:23 |
| nen-20181231.xml | 7354028 | 2019-03-13 13:44:23 |
| nen-20181231.xsd | 113921 | 2019-03-13 13:44:23 |
| nen-20181231ex31142f60a.htm | 13681 | 2019-03-13 13:44:23 |
| nen-20181231ex3122f3bd5.htm | 14441 | 2019-03-13 13:44:23 |
| nen-20181231ex321247617.htm | 18669 | 2019-03-13 13:44:23 |
| nen-20181231x10k.htm | 6458817 | 2019-03-13 13:44:23 |
| nen-20181231_cal.xml | 81635 | 2019-03-13 13:44:23 |
| nen-20181231_def.xml | 445823 | 2019-03-13 13:44:23 |
| nen-20181231_lab.xml | 756457 | 2019-03-13 13:44:23 |
| nen-20181231_pre.xml | 687798 | 2019-03-13 13:44:23 |
 nen20181231x10k001.jpg | 30433 | 2019-03-13 13:44:23 |
| R1.htm | 35400 | 2019-03-13 13:44:23 |
| R10.htm | 6006 | 2019-03-13 13:44:23 |
| R11.htm | 36744 | 2019-03-13 13:44:23 |
| R12.htm | 5110 | 2019-03-13 13:44:23 |
| R13.htm | 22971 | 2019-03-13 13:44:23 |
| R14.htm | 14869 | 2019-03-13 13:44:23 |
| R15.htm | 5052 | 2019-03-13 13:44:23 |
| R16.htm | 93329 | 2019-03-13 13:44:23 |
| R17.htm | 5562 | 2019-03-13 13:44:23 |
| R18.htm | 37715 | 2019-03-13 13:44:23 |
| R19.htm | 48501 | 2019-03-13 13:44:23 |
| R2.htm | 43271 | 2019-03-13 13:44:23 |
| R20.htm | 1960877 | 2019-03-13 13:44:23 |
| R21.htm | 6783 | 2019-03-13 13:44:23 |
| R22.htm | 16112 | 2019-03-13 13:44:23 |
| R23.htm | 143908 | 2019-03-13 13:44:23 |
| R24.htm | 7194 | 2019-03-13 13:44:23 |
| R25.htm | 65677 | 2019-03-13 13:44:23 |
| R26.htm | 70710 | 2019-03-13 13:44:23 |
| R27.htm | 546215 | 2019-03-13 13:44:23 |
| R28.htm | 23071 | 2019-03-13 13:44:23 |
| R29.htm | 19030 | 2019-03-13 13:44:23 |
| R3.htm | 5315 | 2019-03-13 13:44:23 |
| R30.htm | 12843 | 2019-03-13 13:44:23 |
| R31.htm | 92616 | 2019-03-13 13:44:23 |
| R32.htm | 29832 | 2019-03-13 13:44:23 |
| R33.htm | 44831 | 2019-03-13 13:44:23 |
| R34.htm | 1945909 | 2019-03-13 13:44:23 |
| R35.htm | 15329 | 2019-03-13 13:44:23 |
| R36.htm | 143858 | 2019-03-13 13:44:23 |
| R37.htm | 64835 | 2019-03-13 13:44:23 |
| R38.htm | 44735 | 2019-03-13 13:44:23 |
| R39.htm | 74812 | 2019-03-13 13:44:23 |
| R4.htm | 56600 | 2019-03-13 13:44:23 |
| R40.htm | 94462 | 2019-03-13 13:44:23 |
| R41.htm | 268291 | 2019-03-13 13:44:23 |
| R42.htm | 28575 | 2019-03-13 13:44:23 |
| R43.htm | 28688 | 2019-03-13 13:44:23 |
| R44.htm | 32987 | 2019-03-13 13:44:23 |
| R45.htm | 29487 | 2019-03-13 13:44:23 |
| R46.htm | 114057 | 2019-03-13 13:44:23 |
| R47.htm | 14300 | 2019-03-13 13:44:23 |
| R48.htm | 46087 | 2019-03-13 13:44:23 |
| R49.htm | 46732 | 2019-03-13 13:44:23 |
| R5.htm | 49490 | 2019-03-13 13:44:23 |
| R50.htm | 103759 | 2019-03-13 13:44:23 |
| R51.htm | 7676 | 2019-03-13 13:44:23 |
| R52.htm | 51606 | 2019-03-13 13:44:23 |
| R53.htm | 54005 | 2019-03-13 13:44:23 |
| R54.htm | 25877 | 2019-03-13 13:44:23 |
| R55.htm | 9873 | 2019-03-13 13:44:23 |
| R56.htm | 39589 | 2019-03-13 13:44:23 |
| R57.htm | 7613 | 2019-03-13 13:44:23 |
| R58.htm | 8722 | 2019-03-13 13:44:23 |
| R59.htm | 9434 | 2019-03-13 13:44:23 |
| R6.htm | 80341 | 2019-03-13 13:44:23 |
| R60.htm | 31030 | 2019-03-13 13:44:23 |
| R61.htm | 16747 | 2019-03-13 13:44:23 |
| R62.htm | 56797 | 2019-03-13 13:44:23 |
| R63.htm | 61813 | 2019-03-13 13:44:23 |
| R64.htm | 83600 | 2019-03-13 13:44:23 |
| R65.htm | 50109 | 2019-03-13 13:44:23 |
| R66.htm | 60211 | 2019-03-13 13:44:23 |
| R67.htm | 56685 | 2019-03-13 13:44:23 |
| R68.htm | 48761 | 2019-03-13 13:44:23 |
| R69.htm | 234014 | 2019-03-13 13:44:23 |
| R7.htm | 30039 | 2019-03-13 13:44:23 |
| R70.htm | 207694 | 2019-03-13 13:44:23 |
| R71.htm | 49469 | 2019-03-13 13:44:23 |
| R72.htm | 11852 | 2019-03-13 13:44:23 |
| R73.htm | 27560 | 2019-03-13 13:44:23 |
| R74.htm | 45555 | 2019-03-13 13:44:23 |
| R75.htm | 10269 | 2019-03-13 13:44:23 |
| R8.htm | 549100 | 2019-03-13 13:44:23 |
| R9.htm | 10524 | 2019-03-13 13:44:23 |
| report.css | 2767 | 2019-03-13 13:44:23 |
| Show.js | 1085 | 2019-03-13 13:44:23 |