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Note 9 - Prepaid Forward Obligation (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes Tables |
Schedule of Activity in the Carrying Value of the Prepaid Forward Liability [Table Text Block] |
Carrying value of prepaid forward obligation as of December 31, 2021 |  | $ | 85,713 |
Financing on prepaid forward obligation |  |  | 21,559 |
Amounts paid and payable (1) |  |  | (8,349 | )
Carrying value of prepaid forward obligation as of December 31, 2022 |  |  | 98,923 |
Financing on prepaid forward obligation |  |  | 10,568 |
Amounts paid and payable (1) |  |  | (4,984 | )
Carrying value of prepaid forward obligation as of June 30, 2023 |  | $ | 104,507 |

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- Definition The tabular disclosure of activity in the carrying value of the prepaid forward liability. + References No definition available. + Details
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Namespace Prefix: | urgn_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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