Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000355811-22-000003-index-headers.html | 2022-01-28 08:00:11 | |
| 0000355811-22-000003-index.html | 2022-01-28 08:00:11 | |
| 0000355811-22-000003.txt | 2022-01-28 08:00:11 | |
 0000355811-22-000003-xbrl.zip | 22040 | 2022-01-28 08:00:11 |
| exhibit99112312021.htm | 148192 | 2022-01-28 08:00:11 |
| FilingSummary.xml | 1714 | 2022-01-28 08:00:11 |
| Financial_Report.xlsx | 5686 | 2022-01-28 08:00:11 |
 gentex-blacka.jpg | 158578 | 2022-01-28 08:00:11 |
| gntx-20220128.htm | 32650 | 2022-01-28 08:00:11 |
| gntx-20220128.xsd | 1980 | 2022-01-28 08:00:11 |
| gntx-20220128_htm.xml | 10819 | 2022-01-28 08:00:11 |
| gntx-20220128_lab.xml | 24270 | 2022-01-28 08:00:11 |
| gntx-20220128_pre.xml | 12711 | 2022-01-28 08:00:11 |
| MetaLinks.json | 17361 | 2022-01-28 08:00:11 |
| R1.htm | 38632 | 2022-01-28 08:00:11 |
| report.css | 2767 | 2022-01-28 08:00:11 |
| Show.js | 1085 | 2022-01-28 08:00:11 |