Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001023844-17-000009-index-headers.html | 2017-05-15 16:45:17 | |
| 0001023844-17-000009-index.html | 2017-05-15 16:45:17 | |
| 0001023844-17-000009.txt | 2017-05-15 16:45:17 | |
 0001023844-17-000009-xbrl.zip | 189685 | 2017-05-15 16:45:17 |
| exhibit311nhld03312017.htm | 14805 | 2017-05-15 16:45:17 |
| exhibit312nhld03312017.htm | 14355 | 2017-05-15 16:45:17 |
| exhibit321nhld03312017.htm | 7637 | 2017-05-15 16:45:17 |
| exhibit322nhld03312017.htm | 6967 | 2017-05-15 16:45:17 |
| FilingSummary.xml | 41255 | 2017-05-15 16:45:17 |
| Financial_Report.xlsx | 74329 | 2017-05-15 16:45:17 |
| nhld-20170331.xml | 1413482 | 2017-05-15 16:45:17 |
| nhld-20170331.xsd | 51714 | 2017-05-15 16:45:17 |
| nhld-20170331_cal.xml | 85549 | 2017-05-15 16:45:17 |
| nhld-20170331_def.xml | 215031 | 2017-05-15 16:45:17 |
| nhld-20170331_lab.xml | 670017 | 2017-05-15 16:45:17 |
| nhld-20170331_pre.xml | 386744 | 2017-05-15 16:45:17 |
| nhld0331201710-q.htm | 1136918 | 2017-05-15 16:45:17 |
| R1.htm | 21780 | 2017-05-15 16:45:17 |
| R10.htm | 13255 | 2017-05-15 16:45:17 |
| R11.htm | 138188 | 2017-05-15 16:45:17 |
| R12.htm | 26406 | 2017-05-15 16:45:17 |
| R13.htm | 28811 | 2017-05-15 16:45:17 |
| R14.htm | 48453 | 2017-05-15 16:45:17 |
| R15.htm | 22688 | 2017-05-15 16:45:17 |
| R16.htm | 41982 | 2017-05-15 16:45:17 |
| R17.htm | 9237 | 2017-05-15 16:45:17 |
| R18.htm | 11619 | 2017-05-15 16:45:17 |
| R19.htm | 23891 | 2017-05-15 16:45:17 |
| R2.htm | 77433 | 2017-05-15 16:45:17 |
| R20.htm | 11548 | 2017-05-15 16:45:17 |
| R21.htm | 50786 | 2017-05-15 16:45:17 |
| R22.htm | 5995 | 2017-05-15 16:45:17 |
| R23.htm | 8232 | 2017-05-15 16:45:17 |
| R24.htm | 104886 | 2017-05-15 16:45:17 |
| R25.htm | 28790 | 2017-05-15 16:45:17 |
| R26.htm | 7024 | 2017-05-15 16:45:17 |
| R27.htm | 7906 | 2017-05-15 16:45:17 |
| R28.htm | 11443 | 2017-05-15 16:45:17 |
| R29.htm | 9221 | 2017-05-15 16:45:17 |
| R3.htm | 16933 | 2017-05-15 16:45:17 |
| R30.htm | 134691 | 2017-05-15 16:45:17 |
| R31.htm | 23469 | 2017-05-15 16:45:17 |
| R32.htm | 10311 | 2017-05-15 16:45:17 |
| R33.htm | 47702 | 2017-05-15 16:45:17 |
| R34.htm | 22553 | 2017-05-15 16:45:17 |
| R35.htm | 41967 | 2017-05-15 16:45:17 |
| R36.htm | 12418 | 2017-05-15 16:45:17 |
| R37.htm | 42296 | 2017-05-15 16:45:17 |
| R38.htm | 100750 | 2017-05-15 16:45:17 |
| R39.htm | 9238 | 2017-05-15 16:45:17 |
| R4.htm | 77676 | 2017-05-15 16:45:17 |
| R40.htm | 4803 | 2017-05-15 16:45:17 |
| R41.htm | 23001 | 2017-05-15 16:45:17 |
| R42.htm | 12284 | 2017-05-15 16:45:17 |
| R43.htm | 8953 | 2017-05-15 16:45:17 |
| R44.htm | 48716 | 2017-05-15 16:45:17 |
| R45.htm | 62757 | 2017-05-15 16:45:17 |
| R46.htm | 21631 | 2017-05-15 16:45:17 |
| R47.htm | 5077 | 2017-05-15 16:45:17 |
| R48.htm | 43880 | 2017-05-15 16:45:17 |
| R49.htm | 10580 | 2017-05-15 16:45:17 |
| R5.htm | 18188 | 2017-05-15 16:45:17 |
| R50.htm | 23386 | 2017-05-15 16:45:17 |
| R51.htm | 5614 | 2017-05-15 16:45:17 |
| R52.htm | 19360 | 2017-05-15 16:45:17 |
| R53.htm | 22753 | 2017-05-15 16:45:17 |
| R54.htm | 17508 | 2017-05-15 16:45:17 |
| R55.htm | 11447 | 2017-05-15 16:45:17 |
| R56.htm | 18852 | 2017-05-15 16:45:17 |
| R57.htm | 33489 | 2017-05-15 16:45:17 |
| R58.htm | 17889 | 2017-05-15 16:45:17 |
| R59.htm | 42610 | 2017-05-15 16:45:17 |
| R6.htm | 102079 | 2017-05-15 16:45:17 |
| R60.htm | 64364 | 2017-05-15 16:45:17 |
| R61.htm | 25923 | 2017-05-15 16:45:17 |
| R62.htm | 10022 | 2017-05-15 16:45:17 |
| R63.htm | 4105 | 2017-05-15 16:45:17 |
| R64.htm | 32538 | 2017-05-15 16:45:17 |
| R65.htm | 20844 | 2017-05-15 16:45:17 |
| R66.htm | 10138 | 2017-05-15 16:45:17 |
| R67.htm | 4176 | 2017-05-15 16:45:17 |
| R68.htm | 7033 | 2017-05-15 16:45:17 |
| R7.htm | 8007 | 2017-05-15 16:45:17 |
| R8.htm | 10983 | 2017-05-15 16:45:17 |
| R9.htm | 8987 | 2017-05-15 16:45:17 |
| report.css | 2767 | 2017-05-15 16:45:17 |
| Show.js | 1410 | 2017-05-15 16:45:17 |