Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001618563-20-000016-index-headers.html | 2020-02-24 17:11:25 | |
| 0001618563-20-000016-index.html | 2020-02-24 17:11:25 | |
| 0001618563-20-000016.txt | 2020-02-24 17:11:25 | |
 0001618563-20-000016-xbrl.zip | 98715 | 2020-02-24 17:11:25 |
| ex991-q42019erss.htm | 2844724 | 2020-02-24 17:11:25 |
| FilingSummary.xml | 1967 | 2020-02-24 17:11:25 |
| Financial_Report.xlsx | 5980 | 2020-02-24 17:11:25 |
 image0a931.jpg | 9612 | 2020-02-24 17:11:25 |
 image1.jpg | 455390 | 2020-02-24 17:11:25 |
 image2.jpg | 7607896 | 2020-02-24 17:11:25 |
| MetaLinks.json | 24251 | 2020-02-24 17:11:25 |
| nsa-20200224.htm | 47183 | 2020-02-24 17:11:25 |
| nsa-20200224.xsd | 2838 | 2020-02-24 17:11:25 |
| nsa-20200224_cal.xml | 836 | 2020-02-24 17:11:25 |
| nsa-20200224_def.xml | 17656 | 2020-02-24 17:11:25 |
| nsa-20200224_htm.xml | 13976 | 2020-02-24 17:11:25 |
| nsa-20200224_lab.xml | 33238 | 2020-02-24 17:11:25 |
| nsa-20200224_pre.xml | 17936 | 2020-02-24 17:11:25 |
| R1.htm | 44437 | 2020-02-24 17:11:25 |
| report.css | 2767 | 2020-02-24 17:11:25 |
| Show.js | 1085 | 2020-02-24 17:11:25 |