v3.19.1
Document and Entity Information - shares
9 Months Ended
Jan. 31, 2019
Mar. 04, 2019
Document And Entity Information    
Entity Registrant Name Avid Bioservices, Inc.  
Entity Central Index Key 0000704562  
Document Type 10-Q  
Document Period End Date Jan. 31, 2019  
Amendment Flag false  
Current Fiscal Year End Date --04-30  
Is Entity's Reporting Status Current? Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   56,074,509
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2019  
Emerging Growth Company false  
Small Business true