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| 0000912562-23-000025-index.html | 2023-05-03 08:42:07 | |
| 0000912562-23-000025.txt | 2023-05-03 08:42:07 | |
 0000912562-23-000025-xbrl.zip | 323151 | 2023-05-03 08:42:07 |
| FilingSummary.xml | 41065 | 2023-05-03 08:42:07 |
| Financial_Report.xlsx | 77772 | 2023-05-03 08:42:07 |
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| q12023exhibit311.htm | 10633 | 2023-05-03 08:42:07 |
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| q12023exhibit321.htm | 4535 | 2023-05-03 08:42:07 |
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| R9.htm | 6259 | 2023-05-03 08:42:07 |
| report.css | 2767 | 2023-05-03 08:42:07 |
| rock-20230331.htm | 1159782 | 2023-05-03 08:42:07 |
| rock-20230331.xsd | 41211 | 2023-05-03 08:42:07 |
| rock-20230331_cal.xml | 54356 | 2023-05-03 08:42:07 |
| rock-20230331_def.xml | 188674 | 2023-05-03 08:42:07 |
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| rock-20230331_htm.xml | 994755 | 2023-05-03 08:42:07 |
| rock-20230331_lab.xml | 474809 | 2023-05-03 08:42:07 |
| rock-20230331_pre.xml | 329255 | 2023-05-03 08:42:07 |
| Show.js | 1085 | 2023-05-03 08:42:07 |