Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-21-028693-index-headers.html | 2021-05-18 16:01:51 | |
| 0001564590-21-028693-index.html | 2021-05-18 16:01:51 | |
| 0001564590-21-028693.txt | 2021-05-18 16:01:51 | |
 0001564590-21-028693-xbrl.zip | 61870 | 2021-05-18 16:01:51 |
| extr-20210517.xsd | 5804 | 2021-05-18 16:01:51 |
| extr-20210517_lab.xml | 18895 | 2021-05-18 16:01:51 |
| extr-20210517_pre.xml | 11198 | 2021-05-18 16:01:51 |
| extr-8k_20210517.htm | 51369 | 2021-05-18 16:01:51 |
| extr-8k_20210517_htm.xml | 3389 | 2021-05-18 16:01:51 |
| extr-ex41_41.htm | 353211 | 2021-05-18 16:01:51 |
| FilingSummary.xml | 1750 | 2021-05-18 16:01:51 |
| Financial_Report.xlsx | 5650 | 2021-05-18 16:01:51 |
| MetaLinks.json | 19413 | 2021-05-18 16:01:51 |
| R1.htm | 38582 | 2021-05-18 16:01:51 |
| report.css | 2767 | 2021-05-18 16:01:51 |
| Show.js | 1084 | 2021-05-18 16:01:51 |