Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000931148-20-000157-index-headers.html | 2020-12-08 16:45:26 | |
| 0000931148-20-000157-index.html | 2020-12-08 16:45:26 | |
| 0000931148-20-000157.txt | 2020-12-08 16:45:26 | |
 0000931148-20-000157-xbrl.zip | 37339 | 2020-12-08 16:45:26 |
| FilingSummary.xml | 1803 | 2020-12-08 16:45:26 |
| Financial_Report.xlsx | 5480 | 2020-12-08 16:45:26 |
| gti-20201207.htm | 35974 | 2020-12-08 16:45:26 |
| gti-20201207.xsd | 2418 | 2020-12-08 16:45:26 |
| gti-20201207_cal.xml | 709 | 2020-12-08 16:45:26 |
| gti-20201207_def.xml | 1642 | 2020-12-08 16:45:26 |
 gti-20201207_g1.jpg | 16675 | 2020-12-08 16:45:26 |
| gti-20201207_htm.xml | 11098 | 2020-12-08 16:45:26 |
| gti-20201207_lab.xml | 24293 | 2020-12-08 16:45:26 |
| gti-20201207_pre.xml | 12645 | 2020-12-08 16:45:26 |
 image_01a.jpg | 16675 | 2020-12-08 16:45:26 |
| MetaLinks.json | 17393 | 2020-12-08 16:45:26 |
| omlaunchpr-dec7.htm | 15245 | 2020-12-08 16:45:26 |
| ompricingpr-dec8.htm | 15921 | 2020-12-08 16:45:26 |
| R1.htm | 39665 | 2020-12-08 16:45:26 |
| report.css | 2767 | 2020-12-08 16:45:26 |
| Show.js | 1085 | 2020-12-08 16:45:26 |