Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.10.0.1
Document and Entity Information - USD ($)
12 Months Ended
May 31, 2018
Jun. 30, 2018
Nov. 30, 2017
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date May 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Trading Symbol CYDY    
Entity Registrant Name CYTODYN INC.    
Entity Central Index Key 0001175680    
Current Fiscal Year End Date --05-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Common Stock, Shares Outstanding   218,692,779  
Entity Public Float     $ 89,898,278