Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000355811-20-000040-index-headers.html | 2020-10-23 08:00:31 | |
| 0000355811-20-000040-index.html | 2020-10-23 08:00:31 | |
| 0000355811-20-000040.txt | 2020-10-23 08:00:31 | |
 0000355811-20-000040-xbrl.zip | 25872 | 2020-10-23 08:00:31 |
| exhibit99109302020.htm | 219493 | 2020-10-23 08:00:31 |
| FilingSummary.xml | 1790 | 2020-10-23 08:00:31 |
| Financial_Report.xlsx | 5464 | 2020-10-23 08:00:31 |
 gentex-black11.jpg | 158578 | 2020-10-23 08:00:31 |
| gntx-20201023.htm | 38627 | 2020-10-23 08:00:31 |
| gntx-20201023.xsd | 2489 | 2020-10-23 08:00:31 |
| gntx-20201023_cal.xml | 775 | 2020-10-23 08:00:31 |
| gntx-20201023_def.xml | 1731 | 2020-10-23 08:00:31 |
| gntx-20201023_htm.xml | 10759 | 2020-10-23 08:00:31 |
| gntx-20201023_lab.xml | 24270 | 2020-10-23 08:00:31 |
| gntx-20201023_pre.xml | 12711 | 2020-10-23 08:00:31 |
| MetaLinks.json | 17783 | 2020-10-23 08:00:31 |
| R1.htm | 38633 | 2020-10-23 08:00:31 |
| report.css | 2767 | 2020-10-23 08:00:31 |
| Show.js | 1085 | 2020-10-23 08:00:31 |