CONTENT ASSETS - Future Minimum Content Payments (Details) - Content Assets [Member] $ in Thousands	Dec. 31, 2020 USD ($)
Content Assets [Line Items]
2021	$ 16,248
2022	7,974
2023	$ 1,505

Amount of content payments maturing in the next fiscal year following the latest fiscal year.

No definition available.

Name:	uone_ContentPaymentsDueInNextTwelveMonths
Namespace Prefix:	uone_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant