Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-308689-index-headers.html | 2021-10-27 07:31:15 | |
| 0001193125-21-308689-index.html | 2021-10-27 07:31:15 | |
| 0001193125-21-308689.txt | 2021-10-27 07:31:15 | |
 0001193125-21-308689-xbrl.zip | 28997 | 2021-10-27 07:31:15 |
| d223274d8k.htm | 27388 | 2021-10-27 07:31:15 |
| d223274d8k_htm.xml | 3262 | 2021-10-27 07:31:15 |
| d223274dex991.htm | 276997 | 2021-10-27 07:31:15 |
| d223274dex992.htm | 5296 | 2021-10-27 07:31:15 |
| FilingSummary.xml | 1761 | 2021-10-27 07:31:15 |
| Financial_Report.xlsx | 5663 | 2021-10-27 07:31:15 |
 g223274dsp1.jpg | 10809 | 2021-10-27 07:31:15 |
 g223274g1026153527277.jpg | 4916 | 2021-10-27 07:31:15 |
| ghm-20211026.xsd | 2895 | 2021-10-27 07:31:15 |
| ghm-20211026_lab.xml | 17374 | 2021-10-27 07:31:15 |
| ghm-20211026_pre.xml | 10956 | 2021-10-27 07:31:15 |
| MetaLinks.json | 18005 | 2021-10-27 07:31:15 |
| R1.htm | 38607 | 2021-10-27 07:31:15 |
| report.css | 2767 | 2021-10-27 07:31:15 |
| Show.js | 1085 | 2021-10-27 07:31:15 |