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Note 15 - Derivative Financial Instruments - Aggregated Notional Amount (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	May 01, 2021 USD ($)	May 01, 2021 AUD ($)	May 01, 2021 CAD ($)	May 01, 2021 GBP (£)	May 01, 2021 EUR (€)	May 02, 2020 USD ($)	May 02, 2020 AUD ($)	May 02, 2020 CAD ($)	May 02, 2020 GBP (£)	May 02, 2020 EUR (€)
U.S. Dollars/Australian Dollars [Member]
Derivative, Notional Amount	$ 2,410	$ 3,464				$ 2,235	$ 3,323
U.S. Dollars/Canadian Dollars [Member]
Derivative, Notional Amount	0		$ 0			452		$ 648
U.S. Dollars/British Pounds [Member]
Derivative, Notional Amount	418			£ 300		3,160			£ 2,424
U.S. Dollars/Euros [Member]
Derivative, Notional Amount	$ 0				€ 0	$ 1,881				€ 1,689

X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dakt_USDollarsAustralianDollarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dakt_USDollarsCanadianDollarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dakt_USDollarsBritishPoundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=dakt_USDollarsEurosMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: