Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-24-014938-index-headers.html | 2024-05-07 09:18:56 | |
| 0001437749-24-014938-index.html | 2024-05-07 09:18:56 | |
| 0001437749-24-014938.txt | 2024-05-07 09:18:56 | |
 0001437749-24-014938-xbrl.zip | 167170 | 2024-05-07 09:18:56 |
| ex_658542.htm | 11815 | 2024-05-07 09:18:56 |
| ex_658543.htm | 12605 | 2024-05-07 09:18:56 |
| ex_658544.htm | 3668 | 2024-05-07 09:18:56 |
| ex_658545.htm | 3458 | 2024-05-07 09:18:56 |
| FilingSummary.xml | 39889 | 2024-05-07 09:18:56 |
| Financial_Report.xlsx | 78917 | 2024-05-07 09:18:56 |
| gtn-20240331.xsd | 63833 | 2024-05-07 09:18:56 |
| gtn-20240331_cal.xml | 70039 | 2024-05-07 09:18:56 |
| gtn-20240331_def.xml | 425803 | 2024-05-07 09:18:56 |
| gtn-20240331_lab.xml | 405553 | 2024-05-07 09:18:56 |
| gtn-20240331_pre.xml | 465309 | 2024-05-07 09:18:56 |
| gtn20240331_10q.htm | 1490701 | 2024-05-07 09:18:56 |
| gtn20240331_10q_htm.xml | 1470277 | 2024-05-07 09:18:56 |
| MetaLinks.json | 898680 | 2024-05-07 09:18:56 |
| R1.htm | 56339 | 2024-05-07 09:18:56 |
| R10.htm | 86606 | 2024-05-07 09:18:56 |
| R11.htm | 15083 | 2024-05-07 09:18:56 |
| R12.htm | 12327 | 2024-05-07 09:18:56 |
| R13.htm | 9922 | 2024-05-07 09:18:56 |
| R14.htm | 70483 | 2024-05-07 09:18:56 |
| R15.htm | 46522 | 2024-05-07 09:18:56 |
| R16.htm | 6812 | 2024-05-07 09:18:56 |
| R17.htm | 53318 | 2024-05-07 09:18:56 |
| R18.htm | 17643 | 2024-05-07 09:18:56 |
| R19.htm | 81429 | 2024-05-07 09:18:56 |
| R2.htm | 141399 | 2024-05-07 09:18:56 |
| R20.htm | 6179 | 2024-05-07 09:18:56 |
| R21.htm | 11235 | 2024-05-07 09:18:56 |
| R22.htm | 123303 | 2024-05-07 09:18:56 |
| R23.htm | 91857 | 2024-05-07 09:18:56 |
| R24.htm | 35784 | 2024-05-07 09:18:56 |
| R25.htm | 74005 | 2024-05-07 09:18:56 |
| R26.htm | 68284 | 2024-05-07 09:18:56 |
| R27.htm | 43068 | 2024-05-07 09:18:56 |
| R28.htm | 51107 | 2024-05-07 09:18:56 |
| R29.htm | 10061 | 2024-05-07 09:18:56 |
| R3.htm | 33933 | 2024-05-07 09:18:56 |
| R30.htm | 73831 | 2024-05-07 09:18:56 |
| R31.htm | 33510 | 2024-05-07 09:18:56 |
| R32.htm | 9007 | 2024-05-07 09:18:56 |
| R33.htm | 11944 | 2024-05-07 09:18:56 |
| R34.htm | 22435 | 2024-05-07 09:18:56 |
| R35.htm | 11257 | 2024-05-07 09:18:56 |
| R36.htm | 14043 | 2024-05-07 09:18:56 |
| R37.htm | 8696 | 2024-05-07 09:18:56 |
| R38.htm | 6315 | 2024-05-07 09:18:56 |
| R39.htm | 6633 | 2024-05-07 09:18:56 |
| R4.htm | 92984 | 2024-05-07 09:18:56 |
| R40.htm | 19594 | 2024-05-07 09:18:56 |
| R41.htm | 66151 | 2024-05-07 09:18:56 |
| R42.htm | 28062 | 2024-05-07 09:18:56 |
| R43.htm | 41622 | 2024-05-07 09:18:56 |
| R44.htm | 19524 | 2024-05-07 09:18:56 |
| R45.htm | 19807 | 2024-05-07 09:18:56 |
| R46.htm | 10542 | 2024-05-07 09:18:56 |
| R47.htm | 7057 | 2024-05-07 09:18:56 |
| R48.htm | 33934 | 2024-05-07 09:18:56 |
| R49.htm | 16835 | 2024-05-07 09:18:56 |
| R5.htm | 26774 | 2024-05-07 09:18:56 |
| R50.htm | 7426 | 2024-05-07 09:18:56 |
| R51.htm | 18501 | 2024-05-07 09:18:56 |
| R52.htm | 7941 | 2024-05-07 09:18:56 |
| R53.htm | 14723 | 2024-05-07 09:18:56 |
| R54.htm | 19837 | 2024-05-07 09:18:56 |
| R55.htm | 44285 | 2024-05-07 09:18:56 |
| R56.htm | 33498 | 2024-05-07 09:18:56 |
| R57.htm | 8162 | 2024-05-07 09:18:56 |
| R58.htm | 3658 | 2024-05-07 09:18:56 |
| R59.htm | 56121 | 2024-05-07 09:18:56 |
| R6.htm | 68182 | 2024-05-07 09:18:56 |
| R60.htm | 3908 | 2024-05-07 09:18:56 |
| R7.htm | 97029 | 2024-05-07 09:18:56 |
| R8.htm | 109337 | 2024-05-07 09:18:56 |
| R9.htm | 40423 | 2024-05-07 09:18:56 |
| report.css | 2767 | 2024-05-07 09:18:56 |
| Show.js | 1085 | 2024-05-07 09:18:56 |