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| 0001193125-19-216008-index.html | 2019-08-08 07:11:53 | |
| 0001193125-19-216008.txt | 2019-08-08 07:11:53 | |
 0001193125-19-216008-xbrl.zip | 111491 | 2019-08-08 07:11:53 |
| d765310d10q.htm | 783461 | 2019-08-08 07:11:53 |
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| d765310dex322.htm | 3853 | 2019-08-08 07:11:53 |
| FilingSummary.xml | 30183 | 2019-08-08 07:11:53 |
| Financial_Report.xlsx | 53564 | 2019-08-08 07:11:53 |
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| R8.htm | 10049 | 2019-08-08 07:11:53 |
| R9.htm | 15549 | 2019-08-08 07:11:53 |
| report.css | 2767 | 2019-08-08 07:11:53 |
| Show.js | 1085 | 2019-08-08 07:11:53 |
| srra-20190630.xml | 1534682 | 2019-08-08 07:11:53 |
| srra-20190630.xsd | 36707 | 2019-08-08 07:11:53 |
| srra-20190630_cal.xml | 36871 | 2019-08-08 07:11:53 |
| srra-20190630_def.xml | 122947 | 2019-08-08 07:11:53 |
| srra-20190630_lab.xml | 333740 | 2019-08-08 07:11:53 |
| srra-20190630_pre.xml | 240954 | 2019-08-08 07:11:53 |