Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000865058-20-000008-index-headers.html | 2020-03-19 16:38:56 | |
| 0000865058-20-000008-index.html | 2020-03-19 16:38:56 | |
| 0000865058-20-000008.txt | 2020-03-19 16:38:56 | |
 0000865058-20-000008-xbrl.zip | 475914 | 2020-03-19 16:38:56 |
| exhibit211.htm | 4726 | 2020-03-19 16:38:56 |
| exhibit231.htm | 4991 | 2020-03-19 16:38:56 |
| exhibit31112-31x2019.htm | 8878 | 2020-03-19 16:38:56 |
| exhibit31212-31x2019.htm | 8678 | 2020-03-19 16:38:56 |
| exhibit32112-31x2019.htm | 7608 | 2020-03-19 16:38:56 |
| FilingSummary.xml | 67725 | 2020-03-19 16:38:56 |
| Financial_Report.xlsx | 141739 | 2020-03-19 16:38:56 |
 image1a01a23.jpg | 2297 | 2020-03-19 16:38:56 |
 letterheada01.jpg | 14551 | 2020-03-19 16:38:56 |
| MetaLinks.json | 1020329 | 2020-03-19 16:38:56 |
| nsec-20191231.xsd | 84226 | 2020-03-19 16:38:56 |
| nsec-20191231_cal.xml | 173891 | 2020-03-19 16:38:56 |
| nsec-20191231_def.xml | 490700 | 2020-03-19 16:38:56 |
| nsec-20191231_lab.xml | 1134704 | 2020-03-19 16:38:56 |
| nsec-20191231_pre.xml | 726824 | 2020-03-19 16:38:56 |
| nsec12312019-10k.htm | 4334559 | 2020-03-19 16:38:56 |
| nsec12312019-10k_htm.xml | 4316184 | 2020-03-19 16:38:56 |
| R1.htm | 58911 | 2020-03-19 16:38:56 |
| R10.htm | 9705 | 2020-03-19 16:38:56 |
| R100.htm | 39758 | 2020-03-19 16:38:56 |
| R101.htm | 34828 | 2020-03-19 16:38:56 |
| R102.htm | 10350 | 2020-03-19 16:38:56 |
| R11.htm | 20328 | 2020-03-19 16:38:56 |
| R12.htm | 279509 | 2020-03-19 16:38:56 |
| R13.htm | 199051 | 2020-03-19 16:38:56 |
| R14.htm | 16328 | 2020-03-19 16:38:56 |
| R15.htm | 69717 | 2020-03-19 16:38:56 |
| R16.htm | 47185 | 2020-03-19 16:38:56 |
| R17.htm | 311805 | 2020-03-19 16:38:56 |
| R18.htm | 13415 | 2020-03-19 16:38:56 |
| R19.htm | 9244 | 2020-03-19 16:38:56 |
| R2.htm | 106036 | 2020-03-19 16:38:56 |
| R20.htm | 7937 | 2020-03-19 16:38:56 |
| R21.htm | 28519 | 2020-03-19 16:38:56 |
| R22.htm | 54246 | 2020-03-19 16:38:56 |
| R23.htm | 216442 | 2020-03-19 16:38:56 |
| R24.htm | 7289 | 2020-03-19 16:38:56 |
| R25.htm | 6785 | 2020-03-19 16:38:56 |
| R26.htm | 4889 | 2020-03-19 16:38:56 |
| R27.htm | 118244 | 2020-03-19 16:38:56 |
| R28.htm | 90344 | 2020-03-19 16:38:56 |
| R29.htm | 90492 | 2020-03-19 16:38:56 |
| R3.htm | 10663 | 2020-03-19 16:38:56 |
| R30.htm | 53538 | 2020-03-19 16:38:56 |
| R31.htm | 14784 | 2020-03-19 16:38:56 |
| R32.htm | 143061 | 2020-03-19 16:38:56 |
| R33.htm | 11212 | 2020-03-19 16:38:56 |
| R34.htm | 21160 | 2020-03-19 16:38:56 |
| R35.htm | 283711 | 2020-03-19 16:38:56 |
| R36.htm | 186723 | 2020-03-19 16:38:56 |
| R37.htm | 15664 | 2020-03-19 16:38:56 |
| R38.htm | 70412 | 2020-03-19 16:38:56 |
| R39.htm | 47635 | 2020-03-19 16:38:56 |
| R4.htm | 53164 | 2020-03-19 16:38:56 |
| R40.htm | 309224 | 2020-03-19 16:38:56 |
| R41.htm | 7255 | 2020-03-19 16:38:56 |
| R42.htm | 26262 | 2020-03-19 16:38:56 |
| R43.htm | 55312 | 2020-03-19 16:38:56 |
| R44.htm | 218343 | 2020-03-19 16:38:56 |
| R45.htm | 19120 | 2020-03-19 16:38:56 |
| R46.htm | 22033 | 2020-03-19 16:38:56 |
| R47.htm | 10886 | 2020-03-19 16:38:56 |
| R48.htm | 7410 | 2020-03-19 16:38:56 |
| R49.htm | 12582 | 2020-03-19 16:38:56 |
| R5.htm | 16922 | 2020-03-19 16:38:56 |
| R50.htm | 6217 | 2020-03-19 16:38:56 |
| R51.htm | 19378 | 2020-03-19 16:38:56 |
| R52.htm | 5064 | 2020-03-19 16:38:56 |
| R53.htm | 25278 | 2020-03-19 16:38:56 |
| R54.htm | 19778 | 2020-03-19 16:38:56 |
| R55.htm | 15304 | 2020-03-19 16:38:56 |
| R56.htm | 48883 | 2020-03-19 16:38:56 |
| R57.htm | 13930 | 2020-03-19 16:38:56 |
| R58.htm | 48226 | 2020-03-19 16:38:56 |
| R59.htm | 44968 | 2020-03-19 16:38:56 |
| R6.htm | 5570 | 2020-03-19 16:38:56 |
| R60.htm | 22245 | 2020-03-19 16:38:56 |
| R61.htm | 21835 | 2020-03-19 16:38:56 |
| R62.htm | 22855 | 2020-03-19 16:38:56 |
| R63.htm | 9727 | 2020-03-19 16:38:56 |
| R64.htm | 14853 | 2020-03-19 16:38:56 |
| R65.htm | 77022 | 2020-03-19 16:38:56 |
| R66.htm | 49621 | 2020-03-19 16:38:56 |
| R67.htm | 27404 | 2020-03-19 16:38:56 |
| R68.htm | 19155 | 2020-03-19 16:38:56 |
| R69.htm | 11535 | 2020-03-19 16:38:56 |
| R7.htm | 27780 | 2020-03-19 16:38:56 |
| R70.htm | 33032 | 2020-03-19 16:38:56 |
| R71.htm | 22888 | 2020-03-19 16:38:56 |
| R72.htm | 14848 | 2020-03-19 16:38:56 |
| R73.htm | 11614 | 2020-03-19 16:38:56 |
| R74.htm | 24360 | 2020-03-19 16:38:56 |
| R75.htm | 25114 | 2020-03-19 16:38:56 |
| R76.htm | 17175 | 2020-03-19 16:38:56 |
| R77.htm | 31206 | 2020-03-19 16:38:56 |
| R78.htm | 21779 | 2020-03-19 16:38:56 |
| R79.htm | 110032 | 2020-03-19 16:38:56 |
| R8.htm | 75091 | 2020-03-19 16:38:56 |
| R80.htm | 26907 | 2020-03-19 16:38:56 |
| R81.htm | 30020 | 2020-03-19 16:38:56 |
| R82.htm | 29327 | 2020-03-19 16:38:56 |
| R83.htm | 18849 | 2020-03-19 16:38:56 |
| R84.htm | 10746 | 2020-03-19 16:38:56 |
| R85.htm | 19420 | 2020-03-19 16:38:56 |
| R86.htm | 24858 | 2020-03-19 16:38:56 |
| R87.htm | 22307 | 2020-03-19 16:38:56 |
| R88.htm | 16434 | 2020-03-19 16:38:56 |
| R89.htm | 4574 | 2020-03-19 16:38:56 |
| R9.htm | 68905 | 2020-03-19 16:38:56 |
| R90.htm | 68731 | 2020-03-19 16:38:56 |
| R91.htm | 24850 | 2020-03-19 16:38:56 |
| R92.htm | 27578 | 2020-03-19 16:38:56 |
| R93.htm | 6695 | 2020-03-19 16:38:56 |
| R94.htm | 19647 | 2020-03-19 16:38:56 |
| R95.htm | 75670 | 2020-03-19 16:38:56 |
| R96.htm | 45778 | 2020-03-19 16:38:56 |
| R97.htm | 40748 | 2020-03-19 16:38:56 |
| R98.htm | 42552 | 2020-03-19 16:38:56 |
| R99.htm | 6241 | 2020-03-19 16:38:56 |
| report.css | 2768 | 2020-03-19 16:38:56 |
| Show.js | 1085 | 2020-03-19 16:38:56 |