Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-24-005295-index-headers.html | 2024-02-23 10:53:08 | |
| 0001437749-24-005295-index.html | 2024-02-23 10:53:08 | |
| 0001437749-24-005295.txt | 2024-02-23 10:53:08 | |
 0001437749-24-005295-xbrl.zip | 439116 | 2024-02-23 10:53:08 |
| ex_624443.htm | 6613 | 2024-02-23 10:53:08 |
| ex_624444.htm | 2758 | 2024-02-23 10:53:08 |
| ex_624445.htm | 12780 | 2024-02-23 10:53:08 |
| ex_624446.htm | 12809 | 2024-02-23 10:53:08 |
| ex_624447.htm | 4014 | 2024-02-23 10:53:08 |
| ex_624448.htm | 4023 | 2024-02-23 10:53:08 |
| FilingSummary.xml | 55054 | 2024-02-23 10:53:08 |
| Financial_Report.xlsx | 126696 | 2024-02-23 10:53:08 |
| gtn-20231231.xsd | 97243 | 2024-02-23 10:53:08 |
| gtn-20231231_cal.xml | 92868 | 2024-02-23 10:53:08 |
| gtn-20231231_def.xml | 648425 | 2024-02-23 10:53:08 |
| gtn-20231231_lab.xml | 621601 | 2024-02-23 10:53:08 |
| gtn-20231231_pre.xml | 704274 | 2024-02-23 10:53:08 |
| gtn20231231_10k.htm | 3133570 | 2024-02-23 10:53:08 |
| gtn20231231_10k_htm.xml | 3069176 | 2024-02-23 10:53:08 |
| MetaLinks.json | 1135528 | 2024-02-23 10:53:08 |
| R1.htm | 73462 | 2024-02-23 10:53:08 |
| R10.htm | 153681 | 2024-02-23 10:53:08 |
| R11.htm | 86522 | 2024-02-23 10:53:08 |
| R12.htm | 11806 | 2024-02-23 10:53:08 |
| R13.htm | 13094 | 2024-02-23 10:53:08 |
| R14.htm | 11505 | 2024-02-23 10:53:08 |
| R15.htm | 98596 | 2024-02-23 10:53:08 |
| R16.htm | 19939 | 2024-02-23 10:53:08 |
| R17.htm | 93505 | 2024-02-23 10:53:08 |
| R18.htm | 166970 | 2024-02-23 10:53:08 |
| R19.htm | 30921 | 2024-02-23 10:53:08 |
| R2.htm | 137880 | 2024-02-23 10:53:08 |
| R20.htm | 134072 | 2024-02-23 10:53:08 |
| R21.htm | 110072 | 2024-02-23 10:53:08 |
| R22.htm | 9859 | 2024-02-23 10:53:08 |
| R23.htm | 10813 | 2024-02-23 10:53:08 |
| R24.htm | 56907 | 2024-02-23 10:53:08 |
| R25.htm | 145150 | 2024-02-23 10:53:08 |
| R26.htm | 89428 | 2024-02-23 10:53:08 |
| R27.htm | 33531 | 2024-02-23 10:53:08 |
| R28.htm | 82522 | 2024-02-23 10:53:08 |
| R29.htm | 74900 | 2024-02-23 10:53:08 |
| R3.htm | 33905 | 2024-02-23 10:53:08 |
| R30.htm | 96230 | 2024-02-23 10:53:08 |
| R31.htm | 13541 | 2024-02-23 10:53:08 |
| R32.htm | 85312 | 2024-02-23 10:53:08 |
| R33.htm | 164166 | 2024-02-23 10:53:08 |
| R34.htm | 24328 | 2024-02-23 10:53:08 |
| R35.htm | 128061 | 2024-02-23 10:53:08 |
| R36.htm | 105666 | 2024-02-23 10:53:08 |
| R37.htm | 54461 | 2024-02-23 10:53:08 |
| R38.htm | 55044 | 2024-02-23 10:53:08 |
| R39.htm | 8968 | 2024-02-23 10:53:08 |
| R4.htm | 95484 | 2024-02-23 10:53:08 |
| R40.htm | 22216 | 2024-02-23 10:53:08 |
| R41.htm | 19272 | 2024-02-23 10:53:08 |
| R42.htm | 9221 | 2024-02-23 10:53:08 |
| R43.htm | 11999 | 2024-02-23 10:53:08 |
| R44.htm | 6314 | 2024-02-23 10:53:08 |
| R45.htm | 19818 | 2024-02-23 10:53:08 |
| R46.htm | 74089 | 2024-02-23 10:53:08 |
| R47.htm | 81278 | 2024-02-23 10:53:08 |
| R48.htm | 8794 | 2024-02-23 10:53:08 |
| R49.htm | 11268 | 2024-02-23 10:53:08 |
| R5.htm | 30060 | 2024-02-23 10:53:08 |
| R50.htm | 11912 | 2024-02-23 10:53:08 |
| R51.htm | 51254 | 2024-02-23 10:53:08 |
| R52.htm | 26968 | 2024-02-23 10:53:08 |
| R53.htm | 37803 | 2024-02-23 10:53:08 |
| R54.htm | 6413 | 2024-02-23 10:53:08 |
| R55.htm | 24603 | 2024-02-23 10:53:08 |
| R56.htm | 13122 | 2024-02-23 10:53:08 |
| R57.htm | 5427 | 2024-02-23 10:53:08 |
| R58.htm | 7230 | 2024-02-23 10:53:08 |
| R59.htm | 33149 | 2024-02-23 10:53:08 |
| R6.htm | 91036 | 2024-02-23 10:53:08 |
| R60.htm | 18973 | 2024-02-23 10:53:08 |
| R61.htm | 18799 | 2024-02-23 10:53:08 |
| R62.htm | 30695 | 2024-02-23 10:53:08 |
| R63.htm | 21989 | 2024-02-23 10:53:08 |
| R64.htm | 29552 | 2024-02-23 10:53:08 |
| R65.htm | 18159 | 2024-02-23 10:53:08 |
| R66.htm | 7751 | 2024-02-23 10:53:08 |
| R67.htm | 32522 | 2024-02-23 10:53:08 |
| R68.htm | 34341 | 2024-02-23 10:53:08 |
| R69.htm | 7676 | 2024-02-23 10:53:08 |
| R7.htm | 114855 | 2024-02-23 10:53:08 |
| R70.htm | 13262 | 2024-02-23 10:53:08 |
| R71.htm | 12565 | 2024-02-23 10:53:08 |
| R72.htm | 11536 | 2024-02-23 10:53:08 |
| R73.htm | 41995 | 2024-02-23 10:53:08 |
| R74.htm | 32027 | 2024-02-23 10:53:08 |
| R75.htm | 31597 | 2024-02-23 10:53:08 |
| R76.htm | 14323 | 2024-02-23 10:53:08 |
| R77.htm | 33072 | 2024-02-23 10:53:08 |
| R78.htm | 14860 | 2024-02-23 10:53:08 |
| R79.htm | 43836 | 2024-02-23 10:53:08 |
| R8.htm | 123539 | 2024-02-23 10:53:08 |
| R80.htm | 3406 | 2024-02-23 10:53:08 |
| R81.htm | 58228 | 2024-02-23 10:53:08 |
| R82.htm | 23639 | 2024-02-23 10:53:08 |
| R83.htm | 15830 | 2024-02-23 10:53:08 |
| R9.htm | 48693 | 2024-02-23 10:53:08 |
| report.css | 2768 | 2024-02-23 10:53:08 |
| Show.js | 1086 | 2024-02-23 10:53:08 |
 stockgraph1.jpg | 70729 | 2024-02-23 10:53:08 |
 stockgraph2.jpg | 71256 | 2024-02-23 10:53:08 |