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v3.25.2

Note 6 - Retirement Plans (Details Textual) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Pension Plan [Member] |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0 | $ 0
Defined Contribution Plan, Expected Contributions, Remainder of Fiscal Year | 0 |
401(k) Plan [Member] |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount | 14,000 |
Defined Contribution Plan, Expected Contributions, Remainder of Fiscal Year | $ 10,000 |

X
- Definition Amount of the employer's best estimate of contributions expected to be paid to the plan during the remainder of the current fiscal year. + References No definition available. + Details
Name: | gtn_DefinedContributionPlanExpectedContributionsRemainderOfFiscalYear
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=gtn_K401PlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |