Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-20-015927-index-headers.html | 2020-04-08 16:45:38 | |
| 0001564590-20-015927-index.html | 2020-04-08 16:45:38 | |
| 0001564590-20-015927.txt | 2020-04-08 16:45:38 | |
 0001564590-20-015927-xbrl.zip | 15505 | 2020-04-08 16:45:38 |
| extr-20200408.xsd | 5804 | 2020-04-08 16:45:38 |
| extr-20200408_lab.xml | 18710 | 2020-04-08 16:45:38 |
| extr-20200408_pre.xml | 11196 | 2020-04-08 16:45:38 |
| extr-8k_20200408.htm | 54769 | 2020-04-08 16:45:38 |
| extr-8k_20200408_htm.xml | 3389 | 2020-04-08 16:45:38 |
| extr-ex991_45.htm | 33937 | 2020-04-08 16:45:38 |
| FilingSummary.xml | 1751 | 2020-04-08 16:45:38 |
| Financial_Report.xlsx | 5772 | 2020-04-08 16:45:38 |
 g1gejv1ztpbj000001.jpg | 9261 | 2020-04-08 16:45:38 |
| MetaLinks.json | 19369 | 2020-04-08 16:45:38 |
| R1.htm | 38589 | 2020-04-08 16:45:38 |
| report.css | 2766 | 2020-04-08 16:45:38 |
| Show.js | 1084 | 2020-04-08 16:45:38 |