Cover Page - shares	6 Months Ended
	Oct. 31, 2020	Nov. 30, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 31, 2020
Document Transition Report	false
Entity File Number	0-23246
Entity Incorporation, State or Country Code	SD
Entity Tax Identification Number	46-0306862
Entity Address, Address Line One	201 Daktronics Drive
Entity Address, City or Town	Brookings,
Entity Address, State or Province	SD
Entity Address, Postal Zip Code	57006
City Area Code	605
Local Phone Number	692-0200
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 Common Stock, Shares Outstanding		62,750,443
Entity Registrant Name	DAKTRONICS INC /SD/
Entity Central Index Key	0000915779
Current Fiscal Year End Date	--05-01
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, No Par Value
Trading Symbol	DAKT
Security Exchange Name	NASDAQ
Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Preferred Stock Purchase Rights
Trading Symbol	DAKT
Security Exchange Name	NASDAQ