Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000865058-21-000014-index-headers.html | 2021-03-23 16:22:01 | |
| 0000865058-21-000014-index.html | 2021-03-23 16:22:01 | |
| 0000865058-21-000014.txt | 2021-03-23 16:22:01 | |
 0000865058-21-000014-xbrl.zip | 25364 | 2021-03-23 16:22:01 |
| exhibit23112-31x2020.htm | 3534 | 2021-03-23 16:22:01 |
| exhibit31112-31x2020a.htm | 8381 | 2021-03-23 16:22:01 |
| exhibit31212-31x2020a.htm | 8274 | 2021-03-23 16:22:01 |
| exhibit32112-31x2020a.htm | 5110 | 2021-03-23 16:22:01 |
| FilingSummary.xml | 1938 | 2021-03-23 16:22:01 |
| Financial_Report.xlsx | 6309 | 2021-03-23 16:22:01 |
 letterheada011a.jpg | 14551 | 2021-03-23 16:22:01 |
| MetaLinks.json | 26195 | 2021-03-23 16:22:01 |
| nsec-20201231.htm | 64342 | 2021-03-23 16:22:01 |
| nsec-20201231.xsd | 2475 | 2021-03-23 16:22:01 |
| nsec-20201231_cal.xml | 748 | 2021-03-23 16:22:01 |
| nsec-20201231_def.xml | 1685 | 2021-03-23 16:22:01 |
 nsec-20201231_g1.jpg | 2297 | 2021-03-23 16:22:01 |
| nsec-20201231_htm.xml | 17618 | 2021-03-23 16:22:01 |
| nsec-20201231_lab.xml | 36440 | 2021-03-23 16:22:01 |
| nsec-20201231_pre.xml | 19209 | 2021-03-23 16:22:01 |
| R1.htm | 63468 | 2021-03-23 16:22:01 |
| report.css | 2767 | 2021-03-23 16:22:01 |
| Show.js | 1085 | 2021-03-23 16:22:01 |