v2.4.0.6
Document And Entity Information (USD $)
6 Months Ended
Oct. 29, 2011
Nov. 28, 2011
Oct. 29, 2010
Entity Registrant Name DAKTRONICS INC /SD/    
Entity Central Index Key 0000915779    
Current Fiscal Year End Date --04-28    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 451,614,498
Entity Common Stock, Shares Outstanding   41,854,947  
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus Q2    
Document Type 10-Q    
Amendment Flag false    
Document Period End Date Oct. 29, 2011