Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-20-043260-index-headers.html | 2020-09-11 16:10:22 | |
| 0001564590-20-043260-index.html | 2020-09-11 16:10:22 | |
| 0001564590-20-043260.txt | 2020-09-11 16:10:22 | |
 0001564590-20-043260-xbrl.zip | 11369 | 2020-09-11 16:10:22 |
| extr-20200911.xsd | 5804 | 2020-09-11 16:10:22 |
| extr-20200911_lab.xml | 18700 | 2020-09-11 16:10:22 |
| extr-20200911_pre.xml | 11194 | 2020-09-11 16:10:22 |
| extr-8k_20200911.htm | 45742 | 2020-09-11 16:10:22 |
| extr-8k_20200911_htm.xml | 3389 | 2020-09-11 16:10:22 |
| extr-ex161_6.htm | 3821 | 2020-09-11 16:10:22 |
| FilingSummary.xml | 1750 | 2020-09-11 16:10:22 |
| Financial_Report.xlsx | 5429 | 2020-09-11 16:10:22 |
| MetaLinks.json | 19359 | 2020-09-11 16:10:22 |
| R1.htm | 38584 | 2020-09-11 16:10:22 |
| report.css | 2767 | 2020-09-11 16:10:22 |
| Show.js | 1084 | 2020-09-11 16:10:22 |