Document and Entity Information - USD ($)
12 Months Ended
May 31, 2018
Jul. 20, 2018
Nov. 30, 2017
Document And Entity Information [Abstract]      
Entity Registrant Name ANGIODYNAMICS INC    
Entity Central Index Key 0001275187    
Document Type 10-K    
Document Period End Date May 31, 2018    
Amendment Flag false    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --05-31    
Entity Well Known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 631,826,627
Entity Common Stock, Shares Outstanding   36,885,765