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v3.25.3

NET REVENUE - Contract assets and liabilities (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Contract assets: |  |
Unbilled receivables | $ 4,107 | $ 5,969
Contract liabilities: |  |
Customer advances and unearned income | 2,798 | 2,200
Reserve for audience deficiency | 15,228 | 22,383
Unearned event income | $ 6,937 | $ 1,152

X
- Definition Carrying amount of reserve related to audience deficiency + References No definition available. + Details
Name: | uone_AudienceDeficiencyReserveCurrent
Namespace Prefix: | uone_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition It represents advance payments by customers for future services under contract that are generally incurred in the near term. + References No definition available. + Details
Name: | uone_CustomerAdvancesAndUnearnedIncome
Namespace Prefix: | uone_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition It represents payments by customers for upcoming events. + References No definition available. + Details
Name: | uone_UnearnedEventIncome
Namespace Prefix: | uone_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ContractWithCustomerAssetNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ContractWithCustomerLiabilityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_UnbilledReceivablesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant