Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001566469-20-000023-index-headers.html | 2020-05-08 16:17:31 | |
| 0001566469-20-000023-index.html | 2020-05-08 16:17:31 | |
| 0001566469-20-000023.txt | 2020-05-08 16:17:31 | |
 0001566469-20-000023-xbrl.zip | 232112 | 2020-05-08 16:17:31 |
| a10-qq120fs.htm | 1801904 | 2020-05-08 16:17:31 |
| exhibit31103312020.htm | 12994 | 2020-05-08 16:17:31 |
| exhibit31203312020.htm | 13366 | 2020-05-08 16:17:31 |
| exhibit32103312020.htm | 9577 | 2020-05-08 16:17:31 |
| exhibit32203312020.htm | 9360 | 2020-05-08 16:17:31 |
| FilingSummary.xml | 46299 | 2020-05-08 16:17:31 |
| Financial_Report.xlsx | 96868 | 2020-05-08 16:17:31 |
| nh-20200331.xml | 1443799 | 2020-05-08 16:17:31 |
| nh-20200331.xsd | 61679 | 2020-05-08 16:17:31 |
| nh-20200331_cal.xml | 123035 | 2020-05-08 16:17:31 |
| nh-20200331_def.xml | 314986 | 2020-05-08 16:17:31 |
| nh-20200331_lab.xml | 787126 | 2020-05-08 16:17:31 |
| nh-20200331_pre.xml | 491802 | 2020-05-08 16:17:31 |
| R1.htm | 29678 | 2020-05-08 16:17:31 |
| R10.htm | 12565 | 2020-05-08 16:17:31 |
| R11.htm | 8885 | 2020-05-08 16:17:31 |
| R12.htm | 62468 | 2020-05-08 16:17:31 |
| R13.htm | 5712 | 2020-05-08 16:17:31 |
| R14.htm | 48729 | 2020-05-08 16:17:31 |
| R15.htm | 29297 | 2020-05-08 16:17:31 |
| R16.htm | 28101 | 2020-05-08 16:17:31 |
| R17.htm | 5938 | 2020-05-08 16:17:31 |
| R18.htm | 23865 | 2020-05-08 16:17:31 |
| R19.htm | 73654 | 2020-05-08 16:17:31 |
| R2.htm | 105686 | 2020-05-08 16:17:31 |
| R20.htm | 89221 | 2020-05-08 16:17:31 |
| R21.htm | 40523 | 2020-05-08 16:17:31 |
| R22.htm | 32561 | 2020-05-08 16:17:31 |
| R23.htm | 11313 | 2020-05-08 16:17:31 |
| R24.htm | 8147 | 2020-05-08 16:17:31 |
| R25.htm | 67590 | 2020-05-08 16:17:31 |
| R26.htm | 40009 | 2020-05-08 16:17:31 |
| R27.htm | 30149 | 2020-05-08 16:17:31 |
| R28.htm | 21861 | 2020-05-08 16:17:31 |
| R29.htm | 60863 | 2020-05-08 16:17:31 |
| R3.htm | 10736 | 2020-05-08 16:17:31 |
| R30.htm | 26733 | 2020-05-08 16:17:31 |
| R31.htm | 26720 | 2020-05-08 16:17:31 |
| R32.htm | 27593 | 2020-05-08 16:17:31 |
| R33.htm | 17431 | 2020-05-08 16:17:31 |
| R34.htm | 59594 | 2020-05-08 16:17:31 |
| R35.htm | 78987 | 2020-05-08 16:17:31 |
| R36.htm | 38929 | 2020-05-08 16:17:31 |
| R37.htm | 71755 | 2020-05-08 16:17:31 |
| R38.htm | 41482 | 2020-05-08 16:17:31 |
| R39.htm | 5707 | 2020-05-08 16:17:31 |
| R4.htm | 75794 | 2020-05-08 16:17:31 |
| R40.htm | 8753 | 2020-05-08 16:17:31 |
| R41.htm | 6471 | 2020-05-08 16:17:31 |
| R42.htm | 22891 | 2020-05-08 16:17:31 |
| R43.htm | 55784 | 2020-05-08 16:17:31 |
| R44.htm | 32201 | 2020-05-08 16:17:31 |
| R45.htm | 18454 | 2020-05-08 16:17:31 |
| R46.htm | 4890 | 2020-05-08 16:17:31 |
| R47.htm | 11841 | 2020-05-08 16:17:31 |
| R48.htm | 14621 | 2020-05-08 16:17:31 |
| R49.htm | 31835 | 2020-05-08 16:17:31 |
| R5.htm | 16463 | 2020-05-08 16:17:31 |
| R50.htm | 15233 | 2020-05-08 16:17:31 |
| R51.htm | 7796 | 2020-05-08 16:17:31 |
| R52.htm | 18790 | 2020-05-08 16:17:31 |
| R53.htm | 7892 | 2020-05-08 16:17:31 |
| R54.htm | 20260 | 2020-05-08 16:17:31 |
| R55.htm | 18934 | 2020-05-08 16:17:31 |
| R56.htm | 63191 | 2020-05-08 16:17:31 |
| R57.htm | 17960 | 2020-05-08 16:17:31 |
| R58.htm | 19165 | 2020-05-08 16:17:31 |
| R59.htm | 13873 | 2020-05-08 16:17:31 |
| R6.htm | 33029 | 2020-05-08 16:17:31 |
| R60.htm | 38341 | 2020-05-08 16:17:31 |
| R61.htm | 16078 | 2020-05-08 16:17:31 |
| R62.htm | 25084 | 2020-05-08 16:17:31 |
| R63.htm | 13213 | 2020-05-08 16:17:31 |
| R64.htm | 13255 | 2020-05-08 16:17:31 |
| R65.htm | 9345 | 2020-05-08 16:17:31 |
| R66.htm | 25360 | 2020-05-08 16:17:31 |
| R67.htm | 24432 | 2020-05-08 16:17:31 |
| R68.htm | 7520 | 2020-05-08 16:17:31 |
| R69.htm | 14078 | 2020-05-08 16:17:31 |
| R7.htm | 81491 | 2020-05-08 16:17:31 |
| R70.htm | 33504 | 2020-05-08 16:17:31 |
| R71.htm | 17305 | 2020-05-08 16:17:31 |
| R72.htm | 15645 | 2020-05-08 16:17:31 |
| R73.htm | 17658 | 2020-05-08 16:17:31 |
| R74.htm | 20219 | 2020-05-08 16:17:31 |
| R75.htm | 31375 | 2020-05-08 16:17:31 |
| R76.htm | 16487 | 2020-05-08 16:17:31 |
| R77.htm | 108466 | 2020-05-08 16:17:31 |
| R8.htm | 5313 | 2020-05-08 16:17:31 |
| R9.htm | 16526 | 2020-05-08 16:17:31 |
| report.css | 2767 | 2020-05-08 16:17:31 |
| Show.js | 1085 | 2020-05-08 16:17:31 |