Insider Trading Arrangements	9 Months Ended
Sep. 30, 2025 shares
Trading Arrangements, by Individual [Table]
Material Terms of Trading Arrangement [Text Block]	Item 5. Other Information. Trading Plans On August 15, 2025, our Chief Medical Officer, Mark Schoenberg, entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, to sell up to 40,000 ordinary shares. The trading plan expires on November 18, 2026. Agenus License Agreement Termination In November 2025, we provided notice to terminate the license agreement with Agenus in connection with our decision to discontinue development of UGN- 301. Under the terms of the license agreement, following notice of termination, the agreement will terminate upon the later of (a) the expiration of a 180-day notice period; or (b) completion of all wind-down activities and delivery of all Agenus Improvements (as defined in the license agreement) to Agenus. We do not expect to incur any costs in connection with the termination of the agreement. Lease Extension On August 8, 2025, we entered into an amendment to our lease agreement, dated November 4, 2019, between us and Witman Properties, L.L.C. and Alexander Road at Davanne, L.L.C. (collectively, the “Landlord”). Pursuant to the amendment, we extended the expiration date of the lease from January 31, 2026 to April 30, 2031. Commencing with the extension term on February 1, 2026, our base rent will be approximately $0.6 million per year, or approximately $3.0 million in total during the extension term. The foregoing summary of the lease amendment is qualified in its entirety by reference to the lease amendment, a copy of which is filed as Exhibit 10.1 to this Quarterly Report.
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Mark Schoenberg [Member]
Trading Arrangements, by Individual [Table]
Trading Arrangement, Securities Aggregate Available Amount	40,000
Trading Arrangement Adoption Date	August 15, 2025
Trading Arrangement, Individual Title	Chief Medical Officer
Trading Arrangement, Individual Name	Mark Schoenberg
Rule 10b5-1 Arrangement Adopted [Flag]	true

Insider Trading Arrangements

9 Months Ended

Sep. 30, 2025

Trading Arrangements, by Individual [Table]

Material Terms of Trading Arrangement [Text Block]

Item 5. Other Information.

Trading Plans

On August 15, 2025, our Chief Medical Officer, Mark Schoenberg, entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, to sell up to 40,000 ordinary shares. The trading plan expires on November 18, 2026.

Agenus License Agreement Termination

In November 2025, we provided notice to terminate the license agreement with Agenus in connection with our decision to discontinue development of UGN- 301. Under the terms of the license agreement, following notice of termination, the agreement will terminate upon the later of (a) the expiration of a 180-day notice period; or (b) completion of all wind-down activities and delivery of all Agenus Improvements (as defined in the license agreement) to Agenus. We do not expect to incur any costs in connection with the termination of the agreement.

Lease Extension

On August 8, 2025, we entered into an amendment to our lease agreement, dated November 4, 2019, between us and Witman Properties, L.L.C. and Alexander Road at Davanne, L.L.C. (collectively, the “Landlord”). Pursuant to the amendment, we extended the expiration date of the lease from January 31, 2026 to April 30, 2031. Commencing with the extension term on February 1, 2026, our base rent will be approximately $0.6 million per year, or approximately $3.0 million in total during the extension term.

The foregoing summary of the lease amendment is qualified in its entirety by reference to the lease amendment, a copy of which is filed as Exhibit 10.1 to this Quarterly Report.

Rule 10b5-1 Arrangement Terminated [Flag]

false

Non-Rule 10b5-1 Arrangement Terminated [Flag]

false

Non-Rule 10b5-1 Arrangement Adopted [Flag]

false

Mark Schoenberg [Member]

Trading Arrangements, by Individual [Table]

Trading Arrangement, Securities Aggregate Available Amount

40,000

Trading Arrangement Adoption Date

August 15, 2025

Trading Arrangement, Individual Title

Chief Medical Officer

Trading Arrangement, Individual Name

Mark Schoenberg

Rule 10b5-1 Arrangement Adopted [Flag]

true