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| 0000040211-23-000051-index.html | 2023-04-28 15:36:34 | |
| 0000040211-23-000051.txt | 2023-04-28 15:36:34 | |
 0000040211-23-000051-xbrl.zip | 528138 | 2023-04-28 15:36:34 |
| a20230331-exhibit31a.htm | 9773 | 2023-04-28 15:36:34 |
| a20230331-exhibit31b.htm | 9867 | 2023-04-28 15:36:34 |
| a20230331-exhibit32.htm | 7157 | 2023-04-28 15:36:34 |
| FilingSummary.xml | 24371 | 2023-04-28 15:36:34 |
| Financial_Report.xlsx | 55719 | 2023-04-28 15:36:34 |
| gmt-20230331.htm | 1599823 | 2023-04-28 15:36:34 |
| gmt-20230331.xsd | 37796 | 2023-04-28 15:36:34 |
| gmt-20230331_cal.xml | 60728 | 2023-04-28 15:36:34 |
| gmt-20230331_def.xml | 210436 | 2023-04-28 15:36:34 |
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| gmt-20230331_htm.xml | 696589 | 2023-04-28 15:36:34 |
| gmt-20230331_lab.xml | 457113 | 2023-04-28 15:36:34 |
| gmt-20230331_pre.xml | 335787 | 2023-04-28 15:36:34 |
| MetaLinks.json | 630563 | 2023-04-28 15:36:34 |
| R1.htm | 53951 | 2023-04-28 15:36:34 |
| R10.htm | 26813 | 2023-04-28 15:36:34 |
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| R2.htm | 118980 | 2023-04-28 15:36:34 |
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| R9.htm | 13335 | 2023-04-28 15:36:34 |
| report.css | 2767 | 2023-04-28 15:36:34 |
| Show.js | 1085 | 2023-04-28 15:36:34 |