Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-22-015866-index-headers.html | 2022-04-27 07:19:19 | |
| 0001564590-22-015866-index.html | 2022-04-27 07:19:19 | |
| 0001564590-22-015866.txt | 2022-04-27 07:19:19 | |
 0001564590-22-015866-xbrl.zip | 44094 | 2022-04-27 07:19:19 |
| extr-20220427.xsd | 5721 | 2022-04-27 07:19:19 |
| extr-20220427_lab.xml | 18655 | 2022-04-27 07:19:19 |
| extr-20220427_pre.xml | 11148 | 2022-04-27 07:19:19 |
| extr-8k_20220427.htm | 33055 | 2022-04-27 07:19:19 |
| extr-8k_20220427_htm.xml | 3404 | 2022-04-27 07:19:19 |
| extr-ex991_6.htm | 1140898 | 2022-04-27 07:19:19 |
| FilingSummary.xml | 1757 | 2022-04-27 07:19:19 |
| Financial_Report.xlsx | 5663 | 2022-04-27 07:19:19 |
 g03gyxqbrsgz000001.jpg | 28052 | 2022-04-27 07:19:19 |
| MetaLinks.json | 18720 | 2022-04-27 07:19:19 |
| R1.htm | 38688 | 2022-04-27 07:19:19 |
| report.css | 2767 | 2022-04-27 07:19:19 |
| Show.js | 1085 | 2022-04-27 07:19:19 |