SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Launch assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Launch assets	$ 27,764	$ 27,764
Less: accumulated amortization	(14,084)	(9,104)
Launch assets, net	$ 13,680	$ 18,660

Accumulated amount of amortization of launch assets.

No definition available.

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