v2.4.0.6
Document And Entity Information (USD $)
12 Months Ended
Apr. 28, 2012
Jun. 01, 2012
Oct. 29, 2011
Entity Information [Line Items]      
Entity Registrant Name DAKTRONICS INC /SD/    
Entity Central Index Key 0000915779    
Current Fiscal Year End Date --04-28    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Apr. 28, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   42,015,406  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 438,325,388