Document And Entity Information - USD ($)	12 Months Ended
	May 02, 2020	Jun. 08, 2020	Nov. 02, 2019
Document and Entity Information [Abstract]
Document Period End Date	May 02, 2020
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 Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 309,995,906
Entity Common Stock, Shares Outstanding		44,569,143
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false