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 0001618563-20-000069-index-headers.html | 2020-05-11 16:05:11 | |
| 0001618563-20-000069-index.html | 2020-05-11 16:05:11 | |
| 0001618563-20-000069.txt | 2020-05-11 16:05:11 | |
 0001618563-20-000069-xbrl.zip | 81035 | 2020-05-11 16:05:11 |
 a2020tombstone1.jpg | 349486 | 2020-05-11 16:05:11 |
| ex991-q12020erss.htm | 2054495 | 2020-05-11 16:05:11 |
| FilingSummary.xml | 1962 | 2020-05-11 16:05:11 |
| Financial_Report.xlsx | 5979 | 2020-05-11 16:05:11 |
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| MetaLinks.json | 24256 | 2020-05-11 16:05:11 |
| nsa-20200511.htm | 46633 | 2020-05-11 16:05:11 |
| nsa-20200511.xsd | 2838 | 2020-05-11 16:05:11 |
| nsa-20200511_cal.xml | 836 | 2020-05-11 16:05:11 |
| nsa-20200511_def.xml | 17656 | 2020-05-11 16:05:11 |
| nsa-20200511_htm.xml | 13976 | 2020-05-11 16:05:11 |
| nsa-20200511_lab.xml | 33243 | 2020-05-11 16:05:11 |
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 nsa2019editablecover1.jpg | 348338 | 2020-05-11 16:05:11 |
| R1.htm | 44430 | 2020-05-11 16:05:11 |
| report.css | 2767 | 2020-05-11 16:05:11 |
| Show.js | 1085 | 2020-05-11 16:05:11 |