Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000355811-21-000038-index-headers.html | 2021-10-22 08:00:34 | |
| 0000355811-21-000038-index.html | 2021-10-22 08:00:34 | |
| 0000355811-21-000038.txt | 2021-10-22 08:00:34 | |
 0000355811-21-000038-xbrl.zip | 22668 | 2021-10-22 08:00:34 |
| exhibit99109302021.htm | 165213 | 2021-10-22 08:00:34 |
| FilingSummary.xml | 1707 | 2021-10-22 08:00:34 |
| Financial_Report.xlsx | 5684 | 2021-10-22 08:00:34 |
 gentex-blacka.jpg | 158578 | 2021-10-22 08:00:34 |
| gntx-20211022.htm | 32623 | 2021-10-22 08:00:34 |
| gntx-20211022.xsd | 1968 | 2021-10-22 08:00:34 |
| gntx-20211022_htm.xml | 10801 | 2021-10-22 08:00:34 |
| gntx-20211022_lab.xml | 24132 | 2021-10-22 08:00:34 |
| gntx-20211022_pre.xml | 12573 | 2021-10-22 08:00:34 |
| MetaLinks.json | 17042 | 2021-10-22 08:00:34 |
| R1.htm | 38593 | 2021-10-22 08:00:34 |
| report.css | 2767 | 2021-10-22 08:00:34 |
| Show.js | 1085 | 2021-10-22 08:00:34 |