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Item 5. Other Information (Details Textual) Pure in Thousands | 3 Months Ended
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Jun. 30, 2023
Issuer Rule 10b5-1, Number of Trading Agreements Adopted or Terminated by Directors or Executive Officers | 0

X
- Definition Represents the number of directors or executive officers that adopted and/or terminated a trade agreement. + References No definition available. + Details
Name: | gtn_IssuerRule10b51NumberOfTradingAgreementsAdoptedOrTerminatedByDirectorsOrExecutiveOfficers
Namespace Prefix: | gtn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration