Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-21-053306-index-headers.html | 2021-11-02 07:23:27 | |
| 0001564590-21-053306-index.html | 2021-11-02 07:23:27 | |
| 0001564590-21-053306.txt | 2021-11-02 07:23:27 | |
 0001564590-21-053306-xbrl.zip | 39565 | 2021-11-02 07:23:27 |
| extr-20211102.xsd | 5804 | 2021-11-02 07:23:27 |
| extr-20211102_lab.xml | 18700 | 2021-11-02 07:23:27 |
| extr-20211102_pre.xml | 11194 | 2021-11-02 07:23:27 |
| extr-8k_20211102.htm | 33225 | 2021-11-02 07:23:27 |
| extr-8k_20211102_htm.xml | 3408 | 2021-11-02 07:23:27 |
| extr-ex991_6.htm | 893324 | 2021-11-02 07:23:27 |
| FilingSummary.xml | 1750 | 2021-11-02 07:23:27 |
| Financial_Report.xlsx | 5664 | 2021-11-02 07:23:27 |
 gkrd4pv4xfbh000001.jpg | 28052 | 2021-11-02 07:23:27 |
| MetaLinks.json | 19158 | 2021-11-02 07:23:27 |
| R1.htm | 38604 | 2021-11-02 07:23:27 |
| report.css | 2767 | 2021-11-02 07:23:27 |
| Show.js | 1085 | 2021-11-02 07:23:27 |