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Note 19 - Subsequent Events (Details Textual) $ in Millions | Oct. 21, 2022 USD ($)
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Pharmakon Loan [Member] | Subsequent Event [Member] | Secured Debt [Member] |
Secured Long Term Debt, Second Tranche | $ 25

X
- Definition Represents the second tranche related to secured long term debt. + References No definition available. + Details
Name: | urgn_SecuredLongTermDebtSecondTranche
Namespace Prefix: | urgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=urgn_PharmakonLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |