Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-18-003818-index-headers.html | 2018-02-28 16:29:22 | |
| 0001564590-18-003818-index.html | 2018-02-28 16:29:22 | |
| 0001564590-18-003818.txt | 2018-02-28 16:29:22 | |
 0001564590-18-003818-xbrl.zip | 171319 | 2018-02-28 16:29:22 |
| FilingSummary.xml | 42922 | 2018-02-28 16:29:22 |
| Financial_Report.xlsx | 85328 | 2018-02-28 16:29:22 |
 g2018022816394556228838.jpg | 27523 | 2018-02-28 16:29:22 |
| ntri-10k_20171231.htm | 2915926 | 2018-02-28 16:29:22 |
| ntri-20171231.xml | 2578469 | 2018-02-28 16:29:22 |
| ntri-20171231.xsd | 53788 | 2018-02-28 16:29:22 |
| ntri-20171231_cal.xml | 63562 | 2018-02-28 16:29:22 |
| ntri-20171231_def.xml | 214393 | 2018-02-28 16:29:22 |
| ntri-20171231_lab.xml | 493742 | 2018-02-28 16:29:22 |
| ntri-20171231_pre.xml | 396478 | 2018-02-28 16:29:22 |
| ntri-ex211_10.htm | 12918 | 2018-02-28 16:29:22 |
| ntri-ex231_9.htm | 3996 | 2018-02-28 16:29:22 |
| ntri-ex311_11.htm | 18588 | 2018-02-28 16:29:22 |
| ntri-ex312_6.htm | 18621 | 2018-02-28 16:29:22 |
| ntri-ex321_7.htm | 5869 | 2018-02-28 16:29:22 |
| ntri-ex322_8.htm | 5897 | 2018-02-28 16:29:22 |
| R1.htm | 29979 | 2018-02-28 16:29:22 |
| R10.htm | 105836 | 2018-02-28 16:29:22 |
| R11.htm | 106385 | 2018-02-28 16:29:22 |
| R12.htm | 46390 | 2018-02-28 16:29:22 |
| R13.htm | 36047 | 2018-02-28 16:29:22 |
| R14.htm | 54170 | 2018-02-28 16:29:22 |
| R15.htm | 8343 | 2018-02-28 16:29:22 |
| R16.htm | 20422 | 2018-02-28 16:29:22 |
| R17.htm | 10486 | 2018-02-28 16:29:22 |
| R18.htm | 246583 | 2018-02-28 16:29:22 |
| R19.htm | 293348 | 2018-02-28 16:29:22 |
| R2.htm | 80537 | 2018-02-28 16:29:22 |
| R20.htm | 5781 | 2018-02-28 16:29:22 |
| R21.htm | 32204 | 2018-02-28 16:29:22 |
| R22.htm | 123795 | 2018-02-28 16:29:22 |
| R23.htm | 152251 | 2018-02-28 16:29:22 |
| R24.htm | 68612 | 2018-02-28 16:29:22 |
| R25.htm | 105731 | 2018-02-28 16:29:22 |
| R26.htm | 42992 | 2018-02-28 16:29:22 |
| R27.htm | 35120 | 2018-02-28 16:29:22 |
| R28.htm | 54118 | 2018-02-28 16:29:22 |
| R29.htm | 18279 | 2018-02-28 16:29:22 |
| R3.htm | 19031 | 2018-02-28 16:29:22 |
| R30.htm | 251816 | 2018-02-28 16:29:22 |
| R31.htm | 293509 | 2018-02-28 16:29:22 |
| R32.htm | 31881 | 2018-02-28 16:29:22 |
| R33.htm | 122699 | 2018-02-28 16:29:22 |
| R34.htm | 6252 | 2018-02-28 16:29:22 |
| R35.htm | 106248 | 2018-02-28 16:29:22 |
| R36.htm | 27944 | 2018-02-28 16:29:22 |
| R37.htm | 24266 | 2018-02-28 16:29:22 |
| R38.htm | 9162 | 2018-02-28 16:29:22 |
| R39.htm | 17177 | 2018-02-28 16:29:22 |
| R4.htm | 43385 | 2018-02-28 16:29:22 |
| R40.htm | 18943 | 2018-02-28 16:29:22 |
| R41.htm | 4909 | 2018-02-28 16:29:22 |
| R42.htm | 11610 | 2018-02-28 16:29:22 |
| R43.htm | 9746 | 2018-02-28 16:29:22 |
| R44.htm | 13466 | 2018-02-28 16:29:22 |
| R45.htm | 37077 | 2018-02-28 16:29:22 |
| R46.htm | 14153 | 2018-02-28 16:29:22 |
| R47.htm | 16950 | 2018-02-28 16:29:22 |
| R48.htm | 85572 | 2018-02-28 16:29:22 |
| R49.htm | 42553 | 2018-02-28 16:29:22 |
| R5.htm | 12035 | 2018-02-28 16:29:22 |
| R50.htm | 22398 | 2018-02-28 16:29:22 |
| R51.htm | 34485 | 2018-02-28 16:29:22 |
| R52.htm | 28876 | 2018-02-28 16:29:22 |
| R53.htm | 11070 | 2018-02-28 16:29:22 |
| R54.htm | 11244 | 2018-02-28 16:29:22 |
| R55.htm | 64753 | 2018-02-28 16:29:22 |
| R56.htm | 53095 | 2018-02-28 16:29:22 |
| R57.htm | 13153 | 2018-02-28 16:29:22 |
| R58.htm | 30048 | 2018-02-28 16:29:22 |
| R59.htm | 33704 | 2018-02-28 16:29:22 |
| R6.htm | 5236 | 2018-02-28 16:29:22 |
| R60.htm | 12047 | 2018-02-28 16:29:22 |
| R61.htm | 11174 | 2018-02-28 16:29:22 |
| R62.htm | 18813 | 2018-02-28 16:29:22 |
| R7.htm | 57095 | 2018-02-28 16:29:22 |
| R8.htm | 76742 | 2018-02-28 16:29:22 |
| R9.htm | 6759 | 2018-02-28 16:29:22 |
| report.css | 2767 | 2018-02-28 16:29:22 |
| Show.js | 1410 | 2018-02-28 16:29:22 |