Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-20-024216-index-headers.html | 2020-05-11 16:18:38 | |
| 0001564590-20-024216-index.html | 2020-05-11 16:18:38 | |
| 0001564590-20-024216.txt | 2020-05-11 16:18:38 | |
 0001564590-20-024216-xbrl.zip | 41266 | 2020-05-11 16:18:38 |
| extr-20200511.xsd | 5804 | 2020-05-11 16:18:38 |
| extr-20200511_lab.xml | 18708 | 2020-05-11 16:18:38 |
| extr-20200511_pre.xml | 11194 | 2020-05-11 16:18:38 |
| extr-8k_20200511.htm | 32918 | 2020-05-11 16:18:38 |
| extr-8k_20200511_htm.xml | 3389 | 2020-05-11 16:18:38 |
| extr-ex991_6.htm | 1073535 | 2020-05-11 16:18:38 |
| FilingSummary.xml | 1750 | 2020-05-11 16:18:38 |
| Financial_Report.xlsx | 5771 | 2020-05-11 16:18:38 |
| MetaLinks.json | 19367 | 2020-05-11 16:18:38 |
| R1.htm | 38585 | 2020-05-11 16:18:38 |
| report.css | 2766 | 2020-05-11 16:18:38 |
| Show.js | 1085 | 2020-05-11 16:18:38 |