Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-21-021102-index-headers.html | 2021-04-28 07:17:07 | |
| 0001564590-21-021102-index.html | 2021-04-28 07:17:07 | |
| 0001564590-21-021102.txt | 2021-04-28 07:17:07 | |
 0001564590-21-021102-xbrl.zip | 43568 | 2021-04-28 07:17:07 |
| extr-20210428.xsd | 5804 | 2021-04-28 07:17:07 |
| extr-20210428_lab.xml | 18700 | 2021-04-28 07:17:07 |
| extr-20210428_pre.xml | 11194 | 2021-04-28 07:17:07 |
| extr-8k_20210428.htm | 33069 | 2021-04-28 07:17:07 |
| extr-8k_20210428_htm.xml | 3389 | 2021-04-28 07:17:07 |
| extr-ex991_6.htm | 1178926 | 2021-04-28 07:17:07 |
| FilingSummary.xml | 1750 | 2021-04-28 07:17:07 |
| Financial_Report.xlsx | 5651 | 2021-04-28 07:17:07 |
| MetaLinks.json | 19359 | 2021-04-28 07:17:07 |
| R1.htm | 38584 | 2021-04-28 07:17:07 |
| report.css | 2767 | 2021-04-28 07:17:07 |
| Show.js | 1084 | 2021-04-28 07:17:07 |