Document and Entity Information - shares
9 Months Ended
Feb. 28, 2018
Apr. 03, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Feb. 28, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
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 Common Stock, Shares Outstanding   36,804,506