Note 5 - Inventories (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Inventory, Raw Materials, Noncurrent	$ 2,300	$ 0

Carrying amount as of the balance sheet date of noncurrent portion of inventories of raw materials.

No definition available.

Name:	urgn_InventoryRawMaterialsNoncurrent
Namespace Prefix:	urgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant