Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-20-027850-index-headers.html | 2020-06-01 16:06:50 | |
| 0001564590-20-027850-index.html | 2020-06-01 16:06:50 | |
| 0001564590-20-027850.txt | 2020-06-01 16:06:50 | |
 0001564590-20-027850-xbrl.zip | 11793 | 2020-06-01 16:06:50 |
| extr-20200601.xsd | 5804 | 2020-06-01 16:06:50 |
| extr-20200601_lab.xml | 18710 | 2020-06-01 16:06:50 |
| extr-20200601_pre.xml | 11196 | 2020-06-01 16:06:50 |
| extr-8k_20200601.htm | 39268 | 2020-06-01 16:06:50 |
| extr-8k_20200601_htm.xml | 3389 | 2020-06-01 16:06:50 |
| extr-ex41_6.htm | 16052 | 2020-06-01 16:06:50 |
| FilingSummary.xml | 1749 | 2020-06-01 16:06:50 |
| Financial_Report.xlsx | 5769 | 2020-06-01 16:06:50 |
| MetaLinks.json | 19385 | 2020-06-01 16:06:50 |
| R1.htm | 38589 | 2020-06-01 16:06:50 |
| report.css | 2766 | 2020-06-01 16:06:50 |
| Show.js | 1084 | 2020-06-01 16:06:50 |