Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-21-048585-index-headers.html | 2021-09-22 16:13:39 | |
| 0001564590-21-048585-index.html | 2021-09-22 16:13:39 | |
| 0001564590-21-048585.txt | 2021-09-22 16:13:39 | |
 0001564590-21-048585-xbrl.zip | 11132 | 2021-09-22 16:13:39 |
| extr-20210921.xsd | 5713 | 2021-09-22 16:13:39 |
| extr-20210921_lab.xml | 19318 | 2021-09-22 16:13:39 |
| extr-20210921_pre.xml | 11507 | 2021-09-22 16:13:39 |
| extr-8k_20210921.htm | 44776 | 2021-09-22 16:13:39 |
| extr-8k_20210921_htm.xml | 3526 | 2021-09-22 16:13:39 |
| extr-ex161_6.htm | 3512 | 2021-09-22 16:13:39 |
| FilingSummary.xml | 1744 | 2021-09-22 16:13:39 |
| Financial_Report.xlsx | 5679 | 2021-09-22 16:13:39 |
| MetaLinks.json | 19258 | 2021-09-22 16:13:39 |
| R1.htm | 40098 | 2021-09-22 16:13:39 |
| report.css | 2767 | 2021-09-22 16:13:39 |
| Show.js | 1084 | 2021-09-22 16:13:39 |