Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000931148-21-000096-index-headers.html | 2021-06-01 16:58:06 | |
| 0000931148-21-000096-index.html | 2021-06-01 16:58:06 | |
| 0000931148-21-000096.txt | 2021-06-01 16:58:06 | |
 0000931148-21-000096-xbrl.zip | 85138 | 2021-06-01 16:58:06 |
| FilingSummary.xml | 1653 | 2021-06-01 16:58:06 |
| Financial_Report.xlsx | 5707 | 2021-06-01 16:58:06 |
| gti-20210601.htm | 33606 | 2021-06-01 16:58:06 |
| gti-20210601.xsd | 1911 | 2021-06-01 16:58:06 |
 gti-20210601_g1.jpg | 84955 | 2021-06-01 16:58:06 |
| gti-20210601_htm.xml | 11098 | 2021-06-01 16:58:06 |
| gti-20210601_lab.xml | 24293 | 2021-06-01 16:58:06 |
| gti-20210601_pre.xml | 12645 | 2021-06-01 16:58:06 |
| MetaLinks.json | 17226 | 2021-06-01 16:58:06 |
| R1.htm | 39664 | 2021-06-01 16:58:06 |
| report.css | 2767 | 2021-06-01 16:58:06 |
| Show.js | 1084 | 2021-06-01 16:58:06 |