| Document And Entity Information | Aug. 05, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | Gray Television, Inc. |
| Document, Type | 8-K |
| Document, Period End Date | Aug. 5, 2021 |
| Entity, Incorporation, State or Country Code | GA |
| Entity, File Number | 001-13796 |
| Entity, Tax Identification Number | 58-0285030 |
| Entity, Address, Address Line One | 4370 Peachtree Road, NE |
| Entity, Address, City or Town | Atlanta |
| Entity, Address, State or Province | GA |
| Entity, Address, Postal Zip Code | 30319 |
| City Area Code | 404 |
| Local Phone Number | 504-9828 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0000043196 |
| ClassACommonStockNoParValue Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A common stock (no par value) |
| Trading Symbol | GT N.A |
| Security Exchange Name | NYSE |
| CommonStockNoParValue Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | common stock (no par value) |
| Trading Symbol | GTN |
| Security Exchange Name | NYSE |
