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Nature of Business and Summary of Significant Accounting Policies - Insurance (Details) - USD ($) $ in Thousands	May. 02, 2015	Apr. 26, 2014
Accrued expenses
Self-insurance liability	$ 1,783	$ 1,656

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- Definition

Self Insurance Liability

+ References

No definition available.

+ Details

Name:	dakt_SelfInsuranceLiability
Namespace Prefix:	dakt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_AccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: