Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.8.0.1
Document and Entity Information - shares
6 Months Ended
Nov. 30, 2017
Dec. 31, 2017
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Nov. 30, 2017  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Trading Symbol CYDY  
Entity Registrant Name CYTODYN INC.  
Entity Central Index Key 0001175680  
Current Fiscal Year End Date --05-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   169,861,458