Note 13 - Subsequent Event (Details Textual) $ in Millions	May 06, 2024 USD ($)
Subsequent Event [Member]
Available Liquidity, Maximum Authorized Amount to Repurchase Debt	$ 250

The amount of maximum authorized amount to repurchase debt through available liquidity.

No definition available.

Name:	gtn_AvailableLiquidityMaximumAuthorizedAmountToRepurchaseDebt
Namespace Prefix:	gtn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant