v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
May 07, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol URGN  
Entity Registrant Name UroGen Pharma Ltd.  
Entity Central Index Key 0001668243  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   20,791,445