Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001047469-18-001146-index-headers.html | 2018-02-28 15:08:00 | |
| 0001047469-18-001146-index.html | 2018-02-28 15:08:00 | |
| 0001047469-18-001146.txt | 2018-02-28 15:08:00 | |
 0001047469-18-001146-xbrl.zip | 197555 | 2018-02-28 15:08:00 |
| a2234661z10-k.htm | 1917085 | 2018-02-28 15:08:00 |
| a2234661zex-21.htm | 41656 | 2018-02-28 15:08:00 |
| a2234661zex-23_1.htm | 3664 | 2018-02-28 15:08:00 |
| a2234661zex-31_1.htm | 11500 | 2018-02-28 15:08:00 |
| a2234661zex-31_2.htm | 11510 | 2018-02-28 15:08:00 |
| a2234661zex-32_1.htm | 4849 | 2018-02-28 15:08:00 |
| a2234661zex-32_2.htm | 4880 | 2018-02-28 15:08:00 |
| FilingSummary.xml | 40476 | 2018-02-28 15:08:00 |
| Financial_Report.xlsx | 98639 | 2018-02-28 15:08:00 |
 g671375.jpg | 49854 | 2018-02-28 15:08:00 |
| R1.htm | 29990 | 2018-02-28 15:08:00 |
| R10.htm | 201499 | 2018-02-28 15:08:00 |
| R11.htm | 73457 | 2018-02-28 15:08:00 |
| R12.htm | 204340 | 2018-02-28 15:08:00 |
| R13.htm | 44329 | 2018-02-28 15:08:00 |
| R14.htm | 10103 | 2018-02-28 15:08:00 |
| R15.htm | 38707 | 2018-02-28 15:08:00 |
| R16.htm | 173158 | 2018-02-28 15:08:00 |
| R17.htm | 181018 | 2018-02-28 15:08:00 |
| R18.htm | 104189 | 2018-02-28 15:08:00 |
| R19.htm | 85102 | 2018-02-28 15:08:00 |
| R2.htm | 57729 | 2018-02-28 15:08:00 |
| R20.htm | 15143 | 2018-02-28 15:08:00 |
| R21.htm | 82663 | 2018-02-28 15:08:00 |
| R22.htm | 224615 | 2018-02-28 15:08:00 |
| R23.htm | 78682 | 2018-02-28 15:08:00 |
| R24.htm | 31266 | 2018-02-28 15:08:00 |
| R25.htm | 37405 | 2018-02-28 15:08:00 |
| R26.htm | 186914 | 2018-02-28 15:08:00 |
| R27.htm | 72169 | 2018-02-28 15:08:00 |
| R28.htm | 195574 | 2018-02-28 15:08:00 |
| R29.htm | 43248 | 2018-02-28 15:08:00 |
| R3.htm | 10716 | 2018-02-28 15:08:00 |
| R30.htm | 22272 | 2018-02-28 15:08:00 |
| R31.htm | 164265 | 2018-02-28 15:08:00 |
| R32.htm | 177229 | 2018-02-28 15:08:00 |
| R33.htm | 102881 | 2018-02-28 15:08:00 |
| R34.htm | 82764 | 2018-02-28 15:08:00 |
| R35.htm | 94164 | 2018-02-28 15:08:00 |
| R36.htm | 16535 | 2018-02-28 15:08:00 |
| R37.htm | 12085 | 2018-02-28 15:08:00 |
| R38.htm | 18510 | 2018-02-28 15:08:00 |
| R39.htm | 44924 | 2018-02-28 15:08:00 |
| R4.htm | 64011 | 2018-02-28 15:08:00 |
| R40.htm | 24398 | 2018-02-28 15:08:00 |
| R41.htm | 19696 | 2018-02-28 15:08:00 |
| R42.htm | 54919 | 2018-02-28 15:08:00 |
| R43.htm | 53167 | 2018-02-28 15:08:00 |
| R44.htm | 10510 | 2018-02-28 15:08:00 |
| R45.htm | 17686 | 2018-02-28 15:08:00 |
| R46.htm | 23799 | 2018-02-28 15:08:00 |
| R47.htm | 17191 | 2018-02-28 15:08:00 |
| R48.htm | 24214 | 2018-02-28 15:08:00 |
| R49.htm | 20970 | 2018-02-28 15:08:00 |
| R5.htm | 52557 | 2018-02-28 15:08:00 |
| R50.htm | 26908 | 2018-02-28 15:08:00 |
| R51.htm | 19402 | 2018-02-28 15:08:00 |
| R52.htm | 67583 | 2018-02-28 15:08:00 |
| R53.htm | 14084 | 2018-02-28 15:08:00 |
| R54.htm | 15175 | 2018-02-28 15:08:00 |
| R55.htm | 34646 | 2018-02-28 15:08:00 |
| R56.htm | 17888 | 2018-02-28 15:08:00 |
| R57.htm | 20779 | 2018-02-28 15:08:00 |
| R58.htm | 7176 | 2018-02-28 15:08:00 |
| R59.htm | 10249 | 2018-02-28 15:08:00 |
| R6.htm | 89527 | 2018-02-28 15:08:00 |
| R60.htm | 22277 | 2018-02-28 15:08:00 |
| R61.htm | 18802 | 2018-02-28 15:08:00 |
| R62.htm | 16214 | 2018-02-28 15:08:00 |
| R63.htm | 18731 | 2018-02-28 15:08:00 |
| R64.htm | 24135 | 2018-02-28 15:08:00 |
| R65.htm | 12964 | 2018-02-28 15:08:00 |
| R66.htm | 20895 | 2018-02-28 15:08:00 |
| R7.htm | 161501 | 2018-02-28 15:08:00 |
| R8.htm | 31158 | 2018-02-28 15:08:00 |
| R9.htm | 37483 | 2018-02-28 15:08:00 |
| report.css | 2767 | 2018-02-28 15:08:00 |
| Show.js | 1410 | 2018-02-28 15:08:00 |
| usna-20171230.xml | 3172687 | 2018-02-28 15:08:00 |
| usna-20171230.xsd | 57546 | 2018-02-28 15:08:00 |
| usna-20171230_cal.xml | 87112 | 2018-02-28 15:08:00 |
| usna-20171230_def.xml | 169576 | 2018-02-28 15:08:00 |
| usna-20171230_lab.xml | 478104 | 2018-02-28 15:08:00 |
| usna-20171230_pre.xml | 411129 | 2018-02-28 15:08:00 |