Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000931148-21-000093-index-headers.html | 2021-05-14 17:25:40 | |
| 0000931148-21-000093-index.html | 2021-05-14 17:25:40 | |
| 0000931148-21-000093.txt | 2021-05-14 17:25:40 | |
 0000931148-21-000093-xbrl.zip | 85132 | 2021-05-14 17:25:40 |
| FilingSummary.xml | 1653 | 2021-05-14 17:25:40 |
| Financial_Report.xlsx | 5702 | 2021-05-14 17:25:40 |
| gti-20210513.htm | 42310 | 2021-05-14 17:25:40 |
| gti-20210513.xsd | 1911 | 2021-05-14 17:25:40 |
 gti-20210513_g1.jpg | 84955 | 2021-05-14 17:25:40 |
| gti-20210513_htm.xml | 11098 | 2021-05-14 17:25:40 |
| gti-20210513_lab.xml | 24293 | 2021-05-14 17:25:40 |
| gti-20210513_pre.xml | 12645 | 2021-05-14 17:25:40 |
| MetaLinks.json | 17226 | 2021-05-14 17:25:40 |
| R1.htm | 39661 | 2021-05-14 17:25:40 |
| report.css | 2767 | 2021-05-14 17:25:40 |
| Show.js | 1084 | 2021-05-14 17:25:40 |