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Note 1 - Significant Accounting Policies (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Apr. 29, 2017 USD ($) shares | Apr. 30, 2016 USD ($) shares | May 02, 2015 USD ($) shares
Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements | shares | 206,000 | 219,000 | 206,000
Self Insurance Reserve, Noncurrent, Covered by Insurance | $ 5.4 | $ 4.8 |
Inventory, Finished Goods, Gross | 35.0 | 29.1 |
Inventory, Raw Materials, Gross | 18.4 | 18.8 |
Marketing Expense | 44.9 | 38.8 | $ 42.4
Shipping, Handling and Transportation Costs | $ 50.0 | 44.6 | $ 44.4
Number of Operating Segments | 1 |  |
Building and Building Improvements [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 7 years |  |
Building and Building Improvements [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 30 years |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Other Noncurrent Liabilities [Member] |  |  |
Self Insurance Reserve and Coverage by Insurance, Noncurrent | $ 6.9 | $ 5.8 |

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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid after one year (or the normal operating cycle, if longer) and the additional insurance coverage. + References No definition available. + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of equity unit purchase agreements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1707-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1757-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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