LAUNCH ASSETS - Launch support amortization expense (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2025	$ 4,980
2026	3,409
2027	237
2028	68
2029	$ 6

Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for launch assets.

No definition available.

Name:	uone_LaunchAssetsAmortizationExpenseNextTwelveMonths
Namespace Prefix:	uone_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of amortization expense expected to be recognized during the five fiscal year following the latest fiscal year for launch assets.

No definition available.

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

Amount of amortization expense expected to be recognized during the four fiscal year following the latest fiscal year for launch assets.

No definition available.

Name:	uone_LaunchAssetsAmortizationExpenseYearFour
Namespace Prefix:	uone_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for launch assets.

No definition available.

Name:	uone_LaunchAssetsAmortizationExpenseYearThree
Namespace Prefix:	uone_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for launch assets.

No definition available.

Name:	uone_LaunchAssetsAmortizationExpenseYearTwo
Namespace Prefix:	uone_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

No definition available.

Name:	us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration