Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-22-278469-index-headers.html | 2022-11-07 07:00:57 | |
| 0001193125-22-278469-index.html | 2022-11-07 07:00:57 | |
| 0001193125-22-278469.txt | 2022-11-07 07:00:57 | |
 0001193125-22-278469-xbrl.zip | 30330 | 2022-11-07 07:00:57 |
| d314837d8k.htm | 27371 | 2022-11-07 07:00:57 |
| d314837d8k_htm.xml | 3258 | 2022-11-07 07:00:57 |
| d314837dex991.htm | 212875 | 2022-11-07 07:00:57 |
| d314837dex992.htm | 133210 | 2022-11-07 07:00:57 |
| FilingSummary.xml | 1980 | 2022-11-07 07:00:57 |
| Financial_Report.xlsx | 5687 | 2022-11-07 07:00:57 |
 g314837snap1.jpg | 9639 | 2022-11-07 07:00:57 |
| ghm-20221107.xsd | 2863 | 2022-11-07 07:00:57 |
| ghm-20221107_lab.xml | 17236 | 2022-11-07 07:00:57 |
| ghm-20221107_pre.xml | 10818 | 2022-11-07 07:00:57 |
| MetaLinks.json | 17806 | 2022-11-07 07:00:57 |
| R1.htm | 38097 | 2022-11-07 07:00:57 |
| report.css | 2767 | 2022-11-07 07:00:57 |
| Show.js | 1085 | 2022-11-07 07:00:57 |