Document and Entity Information	3 Months Ended
	Mar. 31, 2021 shares
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Trading Symbol	URGN
Title of 12(b) Security	Ordinary Shares, par value NIS 0.01 per share
Security Exchange Name	NASDAQ
Entity Registrant Name	UROGEN PHARMA LTD.
Entity Central Index Key	0001668243
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Ordinary Shares Outstanding	22,280,394
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-38079
Entity Incorporation, State or Country Code	L3
Entity Tax Identification Number	98-1460746
Entity Address, Address Line One	400 Alexander Park Drive
Entity Address, City or Town	Princeton
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08540
City Area Code	646
Local Phone Number	768-9780