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Nature of Business and Summary of Significant Accounting Policies - Insurance (Details) (Accrued expenses, USD $) In Thousands, unless otherwise specified	Apr. 27, 2013	Apr. 28, 2012
Accrued expenses
Self-insurance liability	$ 1,843	$ 2,075

X

- 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