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| 0001564590-17-000906-index.html | 2017-02-02 17:22:04 | |
| 0001564590-17-000906.txt | 2017-02-02 17:22:04 | |
 0001564590-17-000906-xbrl.zip | 175958 | 2017-02-02 17:22:04 |
| extr-10q_20161231.htm | 2631424 | 2017-02-02 17:22:04 |
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| report.css | 2767 | 2017-02-02 17:22:04 |
| Show.js | 1410 | 2017-02-02 17:22:04 |