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Note 4 - Revenue Recognition 1 (Details Textual) $ in Thousands	9 Months Ended
	Jan. 29, 2022 USD ($)
Contract With Customer, Liability, Revenue Recognized During Period	$ 47,356
Revenue, Remaining Performance Obligation, Amount	412,675
Product [Member]
Revenue, Remaining Performance Obligation, Amount	353,345
Service [Member]
Revenue, Remaining Performance Obligation, Amount	$ 59,330

X

- Definition

Amount of revenue recognized during period including amounts previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.)

+ References

No definition available.

+ Details

Name:	dakt_ContractWithCustomerLiabilityRevenueRecognizedDuringPeriod
Namespace Prefix:	dakt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

+ Details

Name:	us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: