v3.19.2
Document and Entity Information - shares
3 Months Ended
Jul. 31, 2019
Aug. 31, 2019
Document And Entity Information    
Entity Registrant Name Avid Bioservices, Inc.  
Entity Central Index Key 0000704562  
Document Type 10-Q  
Document Period End Date Jul. 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   56,237,674
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2020  
Emerging Growth Company false  
Small Business true  
Interactive Data Current Yes  
Incorporation State Country Name DE  
Entity File Number 001-32839