v2.4.0.8
Document and Entity Information Document
9 Months Ended
Jan. 26, 2014
Feb. 28, 2014
Entity Information [Line Items]    
Entity Registrant Name FINISAR CORP  
Entity Central Index Key 0001094739  
Current Fiscal Year End Date --04-27  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jan. 26, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   96,767,546