Document and Entity Information - shares
6 Months Ended
Nov. 30, 2018
Jan. 03, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Nov. 30, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol ANGO  
Entity Registrant Name ANGIODYNAMICS INC  
Entity Central Index Key 0001275187  
Current Fiscal Year End Date --05-31  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding   37,137,203