Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-21-043098-index-headers.html | 2021-08-10 16:17:06 | |
| 0001564590-21-043098-index.html | 2021-08-10 16:17:06 | |
| 0001564590-21-043098.txt | 2021-08-10 16:17:06 | |
 0001564590-21-043098-xbrl.zip | 13296 | 2021-08-10 16:17:06 |
| extr-20210806.xsd | 6514 | 2021-08-10 16:17:06 |
| extr-20210806_def.xml | 13812 | 2021-08-10 16:17:06 |
| extr-20210806_lab.xml | 23724 | 2021-08-10 16:17:06 |
| extr-20210806_pre.xml | 14551 | 2021-08-10 16:17:06 |
| extr-8k_20210806.htm | 39571 | 2021-08-10 16:17:06 |
| extr-8k_20210806_htm.xml | 4931 | 2021-08-10 16:17:06 |
| FilingSummary.xml | 1755 | 2021-08-10 16:17:06 |
| Financial_Report.xlsx | 5784 | 2021-08-10 16:17:06 |
| MetaLinks.json | 23343 | 2021-08-10 16:17:06 |
| R1.htm | 42984 | 2021-08-10 16:17:06 |
| report.css | 2767 | 2021-08-10 16:17:06 |
| Show.js | 1084 | 2021-08-10 16:17:06 |