Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000931148-23-000158-index-headers.html | 2023-11-03 12:19:23 | |
| 0000931148-23-000158-index.html | 2023-11-03 12:19:23 | |
| 0000931148-23-000158.txt | 2023-11-03 12:19:23 | |
 0000931148-23-000158-xbrl.zip | 240068 | 2023-11-03 12:19:23 |
| a2023-3q10qex311.htm | 9970 | 2023-11-03 12:19:23 |
| a2023-3q10qex312.htm | 10028 | 2023-11-03 12:19:23 |
| a2023-3q10qex321.htm | 5832 | 2023-11-03 12:19:23 |
| a2023-3q10qex322.htm | 5752 | 2023-11-03 12:19:23 |
| FilingSummary.xml | 42312 | 2023-11-03 12:19:23 |
| Financial_Report.xlsx | 101056 | 2023-11-03 12:19:23 |
| gti-20230930.htm | 1379534 | 2023-11-03 12:19:23 |
| gti-20230930.xsd | 42961 | 2023-11-03 12:19:23 |
| gti-20230930_cal.xml | 63212 | 2023-11-03 12:19:23 |
| gti-20230930_def.xml | 230612 | 2023-11-03 12:19:23 |
 gti-20230930_g1.jpg | 13851 | 2023-11-03 12:19:23 |
| gti-20230930_htm.xml | 776389 | 2023-11-03 12:19:23 |
| gti-20230930_lab.xml | 613895 | 2023-11-03 12:19:23 |
| gti-20230930_pre.xml | 435869 | 2023-11-03 12:19:23 |
| MetaLinks.json | 728513 | 2023-11-03 12:19:23 |
| R1.htm | 51510 | 2023-11-03 12:19:23 |
| R10.htm | 31758 | 2023-11-03 12:19:23 |
| R11.htm | 24408 | 2023-11-03 12:19:23 |
| R12.htm | 31958 | 2023-11-03 12:19:23 |
| R13.htm | 12333 | 2023-11-03 12:19:23 |
| R14.htm | 26761 | 2023-11-03 12:19:23 |
| R15.htm | 22720 | 2023-11-03 12:19:23 |
| R16.htm | 20427 | 2023-11-03 12:19:23 |
| R17.htm | 82808 | 2023-11-03 12:19:23 |
| R18.htm | 12388 | 2023-11-03 12:19:23 |
| R19.htm | 28557 | 2023-11-03 12:19:23 |
| R2.htm | 97979 | 2023-11-03 12:19:23 |
| R20.htm | 13751 | 2023-11-03 12:19:23 |
| R21.htm | 5891 | 2023-11-03 12:19:23 |
| R22.htm | 15929 | 2023-11-03 12:19:23 |
| R23.htm | 8480 | 2023-11-03 12:19:23 |
| R24.htm | 9540 | 2023-11-03 12:19:23 |
| R25.htm | 28166 | 2023-11-03 12:19:23 |
| R26.htm | 24040 | 2023-11-03 12:19:23 |
| R27.htm | 18911 | 2023-11-03 12:19:23 |
| R28.htm | 13298 | 2023-11-03 12:19:23 |
| R29.htm | 23050 | 2023-11-03 12:19:23 |
| R3.htm | 22362 | 2023-11-03 12:19:23 |
| R30.htm | 8715 | 2023-11-03 12:19:23 |
| R31.htm | 15300 | 2023-11-03 12:19:23 |
| R32.htm | 79381 | 2023-11-03 12:19:23 |
| R33.htm | 11838 | 2023-11-03 12:19:23 |
| R34.htm | 25623 | 2023-11-03 12:19:23 |
| R35.htm | 8975 | 2023-11-03 12:19:23 |
| R36.htm | 13731 | 2023-11-03 12:19:23 |
| R37.htm | 17191 | 2023-11-03 12:19:23 |
| R38.htm | 10719 | 2023-11-03 12:19:23 |
| R39.htm | 6133 | 2023-11-03 12:19:23 |
| R4.htm | 88837 | 2023-11-03 12:19:23 |
| R40.htm | 30361 | 2023-11-03 12:19:23 |
| R41.htm | 6114 | 2023-11-03 12:19:23 |
| R42.htm | 17775 | 2023-11-03 12:19:23 |
| R43.htm | 18946 | 2023-11-03 12:19:23 |
| R44.htm | 31844 | 2023-11-03 12:19:23 |
| R45.htm | 12834 | 2023-11-03 12:19:23 |
| R46.htm | 45622 | 2023-11-03 12:19:23 |
| R47.htm | 36947 | 2023-11-03 12:19:23 |
| R48.htm | 36752 | 2023-11-03 12:19:23 |
| R49.htm | 10577 | 2023-11-03 12:19:23 |
| R5.htm | 8173 | 2023-11-03 12:19:23 |
| R50.htm | 20870 | 2023-11-03 12:19:23 |
| R51.htm | 45434 | 2023-11-03 12:19:23 |
| R52.htm | 24323 | 2023-11-03 12:19:23 |
| R53.htm | 9984 | 2023-11-03 12:19:23 |
| R54.htm | 13451 | 2023-11-03 12:19:23 |
| R55.htm | 11250 | 2023-11-03 12:19:23 |
| R56.htm | 73428 | 2023-11-03 12:19:23 |
| R57.htm | 16134 | 2023-11-03 12:19:23 |
| R58.htm | 18704 | 2023-11-03 12:19:23 |
| R59.htm | 12349 | 2023-11-03 12:19:23 |
| R6.htm | 97329 | 2023-11-03 12:19:23 |
| R60.htm | 28201 | 2023-11-03 12:19:23 |
| R61.htm | 11510 | 2023-11-03 12:19:23 |
| R62.htm | 54441 | 2023-11-03 12:19:23 |
| R63.htm | 47452 | 2023-11-03 12:19:23 |
| R64.htm | 11197 | 2023-11-03 12:19:23 |
| R65.htm | 4846 | 2023-11-03 12:19:23 |
| R7.htm | 123040 | 2023-11-03 12:19:23 |
| R8.htm | 14745 | 2023-11-03 12:19:23 |
| R9.htm | 11107 | 2023-11-03 12:19:23 |
| report.css | 2767 | 2023-11-03 12:19:23 |
| Show.js | 1085 | 2023-11-03 12:19:23 |