Document and Entity Information - shares	7 Months Ended
	Sep. 30, 2019	Dec. 18, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	MEDIACO HOLDING INC.
Entity Central Index Key	0001784254
Entity Current Reporting Status	No
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Trading Symbol	MDIA
Entity File Number	001-39029
Entity Tax Identification Number	842427771
Entity Address, Address Line One	ONE EMMIS PLAZA
Entity Address, Address Line Two	40 MONUMENT CIRCLE
Entity Address, Address Line Three	SUITE 700
Entity Address, City or Town	INDIANAPOLIS
Entity Address, State or Province	INDIANA
Entity Address, Postal Zip Code	46204
City Area Code	317
Local Phone Number	266-0100
Common Stock A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1,666,667
Common Stock B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,359,753