Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000355811-20-000033-index-headers.html | 2020-07-24 08:00:35 | |
| 0000355811-20-000033-index.html | 2020-07-24 08:00:35 | |
| 0000355811-20-000033.txt | 2020-07-24 08:00:35 | |
 0000355811-20-000033-xbrl.zip | 28774 | 2020-07-24 08:00:35 |
| exhibit99106302020.htm | 301528 | 2020-07-24 08:00:35 |
| FilingSummary.xml | 1790 | 2020-07-24 08:00:35 |
| Financial_Report.xlsx | 5466 | 2020-07-24 08:00:35 |
 gentex-black11.jpg | 158578 | 2020-07-24 08:00:35 |
| gntx-20200724.htm | 38290 | 2020-07-24 08:00:35 |
| gntx-20200724.xsd | 2489 | 2020-07-24 08:00:35 |
| gntx-20200724_cal.xml | 775 | 2020-07-24 08:00:35 |
| gntx-20200724_def.xml | 1731 | 2020-07-24 08:00:35 |
| gntx-20200724_htm.xml | 10740 | 2020-07-24 08:00:35 |
| gntx-20200724_lab.xml | 24270 | 2020-07-24 08:00:35 |
| gntx-20200724_pre.xml | 12711 | 2020-07-24 08:00:35 |
| MetaLinks.json | 17783 | 2020-07-24 08:00:35 |
| R1.htm | 38633 | 2020-07-24 08:00:35 |
| report.css | 2767 | 2020-07-24 08:00:35 |
| Show.js | 1085 | 2020-07-24 08:00:35 |