Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-20-036431-index-headers.html | 2020-08-05 07:20:41 | |
| 0001564590-20-036431-index.html | 2020-08-05 07:20:41 | |
| 0001564590-20-036431.txt | 2020-08-05 07:20:41 | |
 0001564590-20-036431-xbrl.zip | 44236 | 2020-08-05 07:20:41 |
| extr-20200805.xsd | 5804 | 2020-08-05 07:20:41 |
| extr-20200805_lab.xml | 18708 | 2020-08-05 07:20:41 |
| extr-20200805_pre.xml | 11194 | 2020-08-05 07:20:41 |
| extr-8k_20200805.htm | 32932 | 2020-08-05 07:20:41 |
| extr-8k_20200805_htm.xml | 3389 | 2020-08-05 07:20:41 |
| extr-ex991_6.htm | 1173138 | 2020-08-05 07:20:41 |
| FilingSummary.xml | 1750 | 2020-08-05 07:20:41 |
| Financial_Report.xlsx | 5435 | 2020-08-05 07:20:41 |
| MetaLinks.json | 19367 | 2020-08-05 07:20:41 |
| R1.htm | 38593 | 2020-08-05 07:20:41 |
| report.css | 2767 | 2020-08-05 07:20:41 |
| Show.js | 1084 | 2020-08-05 07:20:41 |