Note 10 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	12 Months Ended
May. 02, 2015	May. 03, 2014	Apr. 27, 2013
Operating Leases, Rent Expense	$ 8.2	$ 7.9	$ 8.9
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Residual Value of Leased Assets	4.9
Purchase Obligation, Due in Next Twelve Months	$ 54.0

The estimate of the value of the leased asset at the end of the lease term.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 30

-Paragraph 14

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7662307&loc=d3e42840-112730

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant