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| 0000040211-21-000080-index.html | 2021-07-30 15:09:03 | |
| 0000040211-21-000080.txt | 2021-07-30 15:09:03 | |
 0000040211-21-000080-xbrl.zip | 591902 | 2021-07-30 15:09:03 |
| a20210630-exhibit31a.htm | 9781 | 2021-07-30 15:09:03 |
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| a20210630-exhibit32.htm | 7040 | 2021-07-30 15:09:03 |
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| Financial_Report.xlsx | 75545 | 2021-07-30 15:09:03 |
| gmt-20210630.htm | 2481562 | 2021-07-30 15:09:03 |
| gmt-20210630.xsd | 44177 | 2021-07-30 15:09:03 |
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| gmt-20210630_htm.xml | 1786349 | 2021-07-30 15:09:03 |
| gmt-20210630_lab.xml | 566313 | 2021-07-30 15:09:03 |
| gmt-20210630_pre.xml | 430017 | 2021-07-30 15:09:03 |
| MetaLinks.json | 613741 | 2021-07-30 15:09:03 |
| R1.htm | 54672 | 2021-07-30 15:09:03 |
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| report.css | 2767 | 2021-07-30 15:09:03 |
| Show.js | 1085 | 2021-07-30 15:09:03 |