Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000912562-21-000035-index-headers.html | 2021-10-27 08:04:16 | |
| 0000912562-21-000035-index.html | 2021-10-27 08:04:16 | |
| 0000912562-21-000035.txt | 2021-10-27 08:04:16 | |
 0000912562-21-000035-xbrl.zip | 36405 | 2021-10-27 08:04:16 |
| ex992.htm | 11590 | 2021-10-27 08:04:16 |
| exhibit991q32021earningsre.htm | 497081 | 2021-10-27 08:04:16 |
| FilingSummary.xml | 1716 | 2021-10-27 08:04:16 |
| Financial_Report.xlsx | 5716 | 2021-10-27 08:04:16 |
 image_0.jpg | 27565 | 2021-10-27 08:04:16 |
 image_0a.jpg | 27565 | 2021-10-27 08:04:16 |
| MetaLinks.json | 17484 | 2021-10-27 08:04:16 |
| R1.htm | 40177 | 2021-10-27 08:04:16 |
| report.css | 2767 | 2021-10-27 08:04:16 |
| rock-20211027.htm | 38498 | 2021-10-27 08:04:16 |
| rock-20211027.xsd | 2188 | 2021-10-27 08:04:16 |
| rock-20211027_htm.xml | 11432 | 2021-10-27 08:04:16 |
| rock-20211027_lab.xml | 25481 | 2021-10-27 08:04:16 |
| rock-20211027_pre.xml | 13214 | 2021-10-27 08:04:16 |
| Show.js | 1085 | 2021-10-27 08:04:16 |