Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001628280-22-003236-index-headers.html | 2022-02-22 07:06:26 | |
| 0001628280-22-003236-index.html | 2022-02-22 07:06:26 | |
| 0001628280-22-003236.txt | 2022-02-22 07:06:26 | |
 0001628280-22-003236-xbrl.zip | 92706 | 2022-02-22 07:06:26 |
| ex991-q42021erss.htm | 2105122 | 2022-02-22 07:06:26 |
| FilingSummary.xml | 1796 | 2022-02-22 07:06:26 |
| Financial_Report.xlsx | 5865 | 2022-02-22 07:06:26 |
 image0a93.jpg | 9612 | 2022-02-22 07:06:26 |
| MetaLinks.json | 23508 | 2022-02-22 07:06:26 |
| nsa-20220222.htm | 39040 | 2022-02-22 07:06:26 |
| nsa-20220222.xsd | 2561 | 2022-02-22 07:06:26 |
| nsa-20220222_def.xml | 17493 | 2022-02-22 07:06:26 |
| nsa-20220222_htm.xml | 14038 | 2022-02-22 07:06:26 |
| nsa-20220222_lab.xml | 33079 | 2022-02-22 07:06:26 |
| nsa-20220222_pre.xml | 17772 | 2022-02-22 07:06:26 |
 nsa-_editablexfrontxcover.jpg | 326291 | 2022-02-22 07:06:26 |
 q42021tombstone.jpg | 295301 | 2022-02-22 07:06:26 |
| R1.htm | 44400 | 2022-02-22 07:06:26 |
| report.css | 2767 | 2022-02-22 07:06:26 |
| Show.js | 1085 | 2022-02-22 07:06:26 |