Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000865058-16-000073-index-headers.html | 2016-03-18 14:02:09 | |
| 0000865058-16-000073-index.html | 2016-03-18 14:02:09 | |
| 0000865058-16-000073.txt | 2016-03-18 14:02:09 | |
 0000865058-16-000073-xbrl.zip | 333636 | 2016-03-18 14:02:09 |
| exhibit211-12x31x2015.htm | 4866 | 2016-03-18 14:02:09 |
| exhibit31112-31x2015.htm | 8820 | 2016-03-18 14:02:09 |
| exhibit31212-31x2015.htm | 8620 | 2016-03-18 14:02:09 |
| exhibit32112-31x2015.htm | 7655 | 2016-03-18 14:02:09 |
| FilingSummary.xml | 58131 | 2016-03-18 14:02:09 |
| Financial_Report.xlsx | 129554 | 2016-03-18 14:02:09 |
| nsec-20151231.xml | 3328925 | 2016-03-18 14:02:09 |
| nsec-20151231.xsd | 78756 | 2016-03-18 14:02:09 |
| nsec-20151231_cal.xml | 147512 | 2016-03-18 14:02:09 |
| nsec-20151231_def.xml | 397910 | 2016-03-18 14:02:09 |
| nsec-20151231_lab.xml | 967748 | 2016-03-18 14:02:09 |
| nsec-20151231_pre.xml | 608502 | 2016-03-18 14:02:09 |
| nsec12312015-10k.htm | 2772369 | 2016-03-18 14:02:09 |
 nsglogo.jpg | 2297 | 2016-03-18 14:02:09 |
| R1.htm | 28419 | 2016-03-18 14:02:09 |
| R10.htm | 9898 | 2016-03-18 14:02:09 |
| R11.htm | 22008 | 2016-03-18 14:02:09 |
| R12.htm | 279412 | 2016-03-18 14:02:09 |
| R13.htm | 207290 | 2016-03-18 14:02:09 |
| R14.htm | 18689 | 2016-03-18 14:02:09 |
| R15.htm | 73764 | 2016-03-18 14:02:09 |
| R16.htm | 52539 | 2016-03-18 14:02:09 |
| R17.htm | 32590 | 2016-03-18 14:02:09 |
| R18.htm | 15442 | 2016-03-18 14:02:09 |
| R19.htm | 9265 | 2016-03-18 14:02:09 |
| R2.htm | 95405 | 2016-03-18 14:02:09 |
| R20.htm | 8145 | 2016-03-18 14:02:09 |
| R21.htm | 32473 | 2016-03-18 14:02:09 |
| R22.htm | 55559 | 2016-03-18 14:02:09 |
| R23.htm | 200565 | 2016-03-18 14:02:09 |
| R24.htm | 8731 | 2016-03-18 14:02:09 |
| R25.htm | 7488 | 2016-03-18 14:02:09 |
| R26.htm | 4944 | 2016-03-18 14:02:09 |
| R27.htm | 122004 | 2016-03-18 14:02:09 |
| R28.htm | 99133 | 2016-03-18 14:02:09 |
| R29.htm | 99158 | 2016-03-18 14:02:09 |
| R3.htm | 9451 | 2016-03-18 14:02:09 |
| R30.htm | 58886 | 2016-03-18 14:02:09 |
| R31.htm | 16206 | 2016-03-18 14:02:09 |
| R32.htm | 158309 | 2016-03-18 14:02:09 |
| R33.htm | 11132 | 2016-03-18 14:02:09 |
| R34.htm | 22599 | 2016-03-18 14:02:09 |
| R35.htm | 284076 | 2016-03-18 14:02:09 |
| R36.htm | 192440 | 2016-03-18 14:02:09 |
| R37.htm | 17103 | 2016-03-18 14:02:09 |
| R38.htm | 72285 | 2016-03-18 14:02:09 |
| R39.htm | 52301 | 2016-03-18 14:02:09 |
| R4.htm | 52971 | 2016-03-18 14:02:09 |
| R40.htm | 29671 | 2016-03-18 14:02:09 |
| R41.htm | 6927 | 2016-03-18 14:02:09 |
| R42.htm | 26539 | 2016-03-18 14:02:09 |
| R43.htm | 57238 | 2016-03-18 14:02:09 |
| R44.htm | 198470 | 2016-03-18 14:02:09 |
| R45.htm | 22868 | 2016-03-18 14:02:09 |
| R46.htm | 12895 | 2016-03-18 14:02:09 |
| R47.htm | 7268 | 2016-03-18 14:02:09 |
| R48.htm | 12638 | 2016-03-18 14:02:09 |
| R49.htm | 18586 | 2016-03-18 14:02:09 |
| R5.htm | 16102 | 2016-03-18 14:02:09 |
| R50.htm | 5190 | 2016-03-18 14:02:09 |
| R51.htm | 5072 | 2016-03-18 14:02:09 |
| R52.htm | 8502 | 2016-03-18 14:02:09 |
| R53.htm | 25856 | 2016-03-18 14:02:09 |
| R54.htm | 19976 | 2016-03-18 14:02:09 |
| R55.htm | 10889 | 2016-03-18 14:02:09 |
| R56.htm | 34017 | 2016-03-18 14:02:09 |
| R57.htm | 17707 | 2016-03-18 14:02:09 |
| R58.htm | 55764 | 2016-03-18 14:02:09 |
| R59.htm | 46639 | 2016-03-18 14:02:09 |
| R6.htm | 5307 | 2016-03-18 14:02:09 |
| R60.htm | 24049 | 2016-03-18 14:02:09 |
| R61.htm | 9806 | 2016-03-18 14:02:09 |
| R62.htm | 8635 | 2016-03-18 14:02:09 |
| R63.htm | 10492 | 2016-03-18 14:02:09 |
| R64.htm | 74495 | 2016-03-18 14:02:09 |
| R65.htm | 50487 | 2016-03-18 14:02:09 |
| R66.htm | 27418 | 2016-03-18 14:02:09 |
| R67.htm | 18674 | 2016-03-18 14:02:09 |
| R68.htm | 7671 | 2016-03-18 14:02:09 |
| R69.htm | 27802 | 2016-03-18 14:02:09 |
| R7.htm | 20669 | 2016-03-18 14:02:09 |
| R70.htm | 21255 | 2016-03-18 14:02:09 |
| R71.htm | 16665 | 2016-03-18 14:02:09 |
| R72.htm | 20679 | 2016-03-18 14:02:09 |
| R73.htm | 12624 | 2016-03-18 14:02:09 |
| R74.htm | 41899 | 2016-03-18 14:02:09 |
| R75.htm | 17218 | 2016-03-18 14:02:09 |
| R76.htm | 10010 | 2016-03-18 14:02:09 |
| R77.htm | 29381 | 2016-03-18 14:02:09 |
| R78.htm | 22370 | 2016-03-18 14:02:09 |
| R79.htm | 19202 | 2016-03-18 14:02:09 |
| R8.htm | 81348 | 2016-03-18 14:02:09 |
| R80.htm | 10768 | 2016-03-18 14:02:09 |
| R81.htm | 14999 | 2016-03-18 14:02:09 |
| R82.htm | 23900 | 2016-03-18 14:02:09 |
| R83.htm | 20164 | 2016-03-18 14:02:09 |
| R84.htm | 16137 | 2016-03-18 14:02:09 |
| R85.htm | 4576 | 2016-03-18 14:02:09 |
| R86.htm | 56129 | 2016-03-18 14:02:09 |
| R87.htm | 24867 | 2016-03-18 14:02:09 |
| R88.htm | 26758 | 2016-03-18 14:02:09 |
| R89.htm | 10089 | 2016-03-18 14:02:09 |
| R9.htm | 71451 | 2016-03-18 14:02:09 |
| R90.htm | 71392 | 2016-03-18 14:02:09 |
| R91.htm | 42664 | 2016-03-18 14:02:09 |
| R92.htm | 40689 | 2016-03-18 14:02:09 |
| R93.htm | 45989 | 2016-03-18 14:02:09 |
| R94.htm | 6562 | 2016-03-18 14:02:09 |
| R95.htm | 38647 | 2016-03-18 14:02:09 |
| R96.htm | 32630 | 2016-03-18 14:02:09 |
| R97.htm | 11100 | 2016-03-18 14:02:09 |
| report.css | 2768 | 2016-03-18 14:02:09 |
| Show.js | 1411 | 2016-03-18 14:02:09 |