Note 1 - Significant Accounting Policies (Details Textual) (USD $) In Millions, unless otherwise specified	Jan. 31, 2015	May 03, 2014
Accounting Policies [Abstract]
Inventory, Finished Goods, Gross	$ 27.5us-gaap_InventoryFinishedGoods	$ 27.2us-gaap_InventoryFinishedGoods
Inventory, Raw Materials, Gross	$ 19.0us-gaap_InventoryRawMaterials	$ 16.7us-gaap_InventoryRawMaterials

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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