v3.6.0.2
Document And Entity Information - shares
9 Months Ended
Jan. 28, 2017
Feb. 27, 2017
Entity Information [Line Items]    
Entity Registrant Name DAKTRONICS INC /SD/  
Entity Central Index Key 0000915779  
Current Fiscal Year End Date --04-29  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   44,067,563
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q3  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jan. 28, 2017