Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-23-004505-index-headers.html | 2023-02-24 12:15:21 | |
| 0001437749-23-004505-index.html | 2023-02-24 12:15:21 | |
| 0001437749-23-004505.txt | 2023-02-24 12:15:21 | |
 0001437749-23-004505-xbrl.zip | 364168 | 2023-02-24 12:15:21 |
| ex_474486.htm | 9740 | 2023-02-24 12:15:21 |
| ex_474487.htm | 2508 | 2023-02-24 12:15:21 |
| ex_474488.htm | 13352 | 2023-02-24 12:15:21 |
| ex_474489.htm | 13247 | 2023-02-24 12:15:21 |
| ex_474490.htm | 3961 | 2023-02-24 12:15:21 |
| ex_474491.htm | 3870 | 2023-02-24 12:15:21 |
| FilingSummary.xml | 56388 | 2023-02-24 12:15:21 |
| Financial_Report.xlsx | 128380 | 2023-02-24 12:15:21 |
 g01.jpg | 34909 | 2023-02-24 12:15:21 |
 g02.jpg | 36683 | 2023-02-24 12:15:21 |
| gtn-20221231.xsd | 93900 | 2023-02-24 12:15:21 |
| gtn-20221231_cal.xml | 92154 | 2023-02-24 12:15:21 |
| gtn-20221231_def.xml | 636228 | 2023-02-24 12:15:21 |
| gtn-20221231_lab.xml | 597252 | 2023-02-24 12:15:21 |
| gtn-20221231_pre.xml | 692539 | 2023-02-24 12:15:21 |
| gtn20221231_10k.htm | 2859847 | 2023-02-24 12:15:21 |
| gtn20221231_10k_htm.xml | 2646175 | 2023-02-24 12:15:21 |
| MetaLinks.json | 1058774 | 2023-02-24 12:15:21 |
| R1.htm | 71164 | 2023-02-24 12:15:21 |
| R10.htm | 166183 | 2023-02-24 12:15:21 |
| R11.htm | 64847 | 2023-02-24 12:15:21 |
| R12.htm | 11671 | 2023-02-24 12:15:21 |
| R13.htm | 13037 | 2023-02-24 12:15:21 |
| R14.htm | 11508 | 2023-02-24 12:15:21 |
| R15.htm | 81830 | 2023-02-24 12:15:21 |
| R16.htm | 18291 | 2023-02-24 12:15:21 |
| R17.htm | 74947 | 2023-02-24 12:15:21 |
| R18.htm | 139248 | 2023-02-24 12:15:21 |
| R19.htm | 33141 | 2023-02-24 12:15:21 |
| R2.htm | 140782 | 2023-02-24 12:15:21 |
| R20.htm | 124216 | 2023-02-24 12:15:21 |
| R21.htm | 83973 | 2023-02-24 12:15:21 |
| R22.htm | 11022 | 2023-02-24 12:15:21 |
| R23.htm | 45610 | 2023-02-24 12:15:21 |
| R24.htm | 114918 | 2023-02-24 12:15:21 |
| R25.htm | 67128 | 2023-02-24 12:15:21 |
| R26.htm | 27660 | 2023-02-24 12:15:21 |
| R27.htm | 88544 | 2023-02-24 12:15:21 |
| R28.htm | 58761 | 2023-02-24 12:15:21 |
| R29.htm | 79202 | 2023-02-24 12:15:21 |
| R3.htm | 33026 | 2023-02-24 12:15:21 |
| R30.htm | 11791 | 2023-02-24 12:15:21 |
| R31.htm | 67787 | 2023-02-24 12:15:21 |
| R32.htm | 136349 | 2023-02-24 12:15:21 |
| R33.htm | 26498 | 2023-02-24 12:15:21 |
| R34.htm | 119382 | 2023-02-24 12:15:21 |
| R35.htm | 79375 | 2023-02-24 12:15:21 |
| R36.htm | 43529 | 2023-02-24 12:15:21 |
| R37.htm | 23089 | 2023-02-24 12:15:21 |
| R38.htm | 10524 | 2023-02-24 12:15:21 |
| R39.htm | 21839 | 2023-02-24 12:15:21 |
| R4.htm | 97140 | 2023-02-24 12:15:21 |
| R40.htm | 16087 | 2023-02-24 12:15:21 |
| R41.htm | 9317 | 2023-02-24 12:15:21 |
| R42.htm | 10884 | 2023-02-24 12:15:21 |
| R43.htm | 6349 | 2023-02-24 12:15:21 |
| R44.htm | 19997 | 2023-02-24 12:15:21 |
| R45.htm | 92217 | 2023-02-24 12:15:21 |
| R46.htm | 134128 | 2023-02-24 12:15:21 |
| R47.htm | 8861 | 2023-02-24 12:15:21 |
| R48.htm | 11282 | 2023-02-24 12:15:21 |
| R49.htm | 12038 | 2023-02-24 12:15:21 |
| R5.htm | 27280 | 2023-02-24 12:15:21 |
| R50.htm | 24191 | 2023-02-24 12:15:21 |
| R51.htm | 27576 | 2023-02-24 12:15:21 |
| R52.htm | 38489 | 2023-02-24 12:15:21 |
| R53.htm | 6526 | 2023-02-24 12:15:21 |
| R54.htm | 28372 | 2023-02-24 12:15:21 |
| R55.htm | 13228 | 2023-02-24 12:15:21 |
| R56.htm | 5467 | 2023-02-24 12:15:21 |
| R57.htm | 6970 | 2023-02-24 12:15:21 |
| R58.htm | 34277 | 2023-02-24 12:15:21 |
| R59.htm | 19186 | 2023-02-24 12:15:21 |
| R6.htm | 97799 | 2023-02-24 12:15:21 |
| R60.htm | 18977 | 2023-02-24 12:15:21 |
| R61.htm | 22445 | 2023-02-24 12:15:21 |
| R62.htm | 22514 | 2023-02-24 12:15:21 |
| R63.htm | 30258 | 2023-02-24 12:15:21 |
| R64.htm | 20340 | 2023-02-24 12:15:21 |
| R65.htm | 7817 | 2023-02-24 12:15:21 |
| R66.htm | 32773 | 2023-02-24 12:15:21 |
| R67.htm | 35002 | 2023-02-24 12:15:21 |
| R68.htm | 7742 | 2023-02-24 12:15:21 |
| R69.htm | 13601 | 2023-02-24 12:15:21 |
| R7.htm | 115814 | 2023-02-24 12:15:21 |
| R70.htm | 12665 | 2023-02-24 12:15:21 |
| R71.htm | 11551 | 2023-02-24 12:15:21 |
| R72.htm | 42026 | 2023-02-24 12:15:21 |
| R73.htm | 32143 | 2023-02-24 12:15:21 |
| R74.htm | 32869 | 2023-02-24 12:15:21 |
| R75.htm | 12030 | 2023-02-24 12:15:21 |
| R76.htm | 31535 | 2023-02-24 12:15:21 |
| R77.htm | 15434 | 2023-02-24 12:15:21 |
| R78.htm | 44127 | 2023-02-24 12:15:21 |
| R79.htm | 3420 | 2023-02-24 12:15:21 |
| R8.htm | 94029 | 2023-02-24 12:15:21 |
| R80.htm | 52726 | 2023-02-24 12:15:21 |
| R81.htm | 39920 | 2023-02-24 12:15:21 |
| R82.htm | 15911 | 2023-02-24 12:15:21 |
| R9.htm | 42943 | 2023-02-24 12:15:21 |
| R9999.htm | 16118 | 2023-02-24 12:15:21 |
| report.css | 2768 | 2023-02-24 12:15:21 |
| Show.js | 1086 | 2023-02-24 12:15:21 |