Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001618563-21-000012-index-headers.html | 2021-02-22 16:02:16 | |
| 0001618563-21-000012-index.html | 2021-02-22 16:02:16 | |
| 0001618563-21-000012.txt | 2021-02-22 16:02:16 | |
 0001618563-21-000012-xbrl.zip | 90965 | 2021-02-22 16:02:16 |
| ex991-q42020erss.htm | 2015637 | 2021-02-22 16:02:16 |
| FilingSummary.xml | 1962 | 2021-02-22 16:02:16 |
| Financial_Report.xlsx | 5643 | 2021-02-22 16:02:16 |
 image0a931a.jpg | 9612 | 2021-02-22 16:02:16 |
 image1a.jpg | 1946507 | 2021-02-22 16:02:16 |
 image2a.jpg | 6478403 | 2021-02-22 16:02:16 |
| MetaLinks.json | 24256 | 2021-02-22 16:02:16 |
| nsa-20210222.htm | 39016 | 2021-02-22 16:02:16 |
| nsa-20210222.xsd | 2838 | 2021-02-22 16:02:16 |
| nsa-20210222_cal.xml | 836 | 2021-02-22 16:02:16 |
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| nsa-20210222_htm.xml | 13995 | 2021-02-22 16:02:16 |
| nsa-20210222_lab.xml | 33243 | 2021-02-22 16:02:16 |
| nsa-20210222_pre.xml | 17936 | 2021-02-22 16:02:16 |
| R1.htm | 44437 | 2021-02-22 16:02:16 |
| report.css | 2767 | 2021-02-22 16:02:16 |
| Show.js | 1085 | 2021-02-22 16:02:16 |