v2.4.0.8
Document And Entity Information (USD $)
12 Months Ended
May 02, 2015
Jun. 15, 2015
Nov. 01, 2014
Document and Entity Information [Abstract]      
Document Period End Date May 02, 2015    
Entity Registrant Name DAKTRONICS INC /SD/    
Entity Central Index Key 0000915779    
Current Fiscal Year End Date --05-02    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 577,558,461
Entity Common Stock, Shares Outstanding   43,756,906  
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false