Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000931148-23-000142-index-headers.html | 2023-09-28 16:33:04 | |
| 0000931148-23-000142-index.html | 2023-09-28 16:33:04 | |
| 0000931148-23-000142.txt | 2023-09-28 16:33:04 | |
 0000931148-23-000142-xbrl.zip | 88148 | 2023-09-28 16:33:04 |
| exhibit991-leadershipupdate.htm | 10531 | 2023-09-28 16:33:04 |
| FilingSummary.xml | 1675 | 2023-09-28 16:33:04 |
| Financial_Report.xlsx | 5699 | 2023-09-28 16:33:04 |
| gti-20230925.htm | 30538 | 2023-09-28 16:33:04 |
| gti-20230925.xsd | 1901 | 2023-09-28 16:33:04 |
 gti-20230925_g1.jpg | 84955 | 2023-09-28 16:33:04 |
| gti-20230925_htm.xml | 2720 | 2023-09-28 16:33:04 |
| gti-20230925_lab.xml | 24157 | 2023-09-28 16:33:04 |
| gti-20230925_pre.xml | 12509 | 2023-09-28 16:33:04 |
 image_0.jpg | 84955 | 2023-09-28 16:33:04 |
| MetaLinks.json | 17086 | 2023-09-28 16:33:04 |
| R1.htm | 38108 | 2023-09-28 16:33:04 |
| report.css | 2767 | 2023-09-28 16:33:04 |
| Show.js | 1085 | 2023-09-28 16:33:04 |