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Note 1 - Significant Accounting Policies (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Apr. 27, 2019 USD ($) shares | Apr. 28, 2018 USD ($) shares | Apr. 29, 2017 USD ($) shares | Apr. 30, 2016 USD ($)
Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements | shares | 284,000 | 323,000 | 206,000 |
Self Insurance Reserve and Coverage by Insurance, Noncurrent | $ 5,700 | $ 6,500 |  |
Self Insurance Reserve, Noncurrent, Covered by Insurance | 4,300 | 5,000 |  |
Inventory, Finished Goods, Gross, Total | 48,700 | 37,600 |  |
Inventory, Raw Materials, Gross, Total | 22,000 | 23,300 |  |
Marketing Expense | 55,300 | 49,700 | $ 44,900 |
Shipping and Handling Costs | 72,400 | 63,300 | 50,000 |
Net Cash Provided by (Used in) Financing Activities, Total | (134,791) | (69,318) | (69,485) |
Deferred Tax Liabilities, Net, Noncurrent | $ 15,987 | $ 14,502 |  |
Number of Operating Segments | 1 |  |  |
Accounting Standards Update 2016-09 [Member] |  |  |  |
Net Cash Provided by (Used in) Financing Activities, Total |  |  | (495) | $ (1,500)
Accounting Standards Update 2015-17 [Member] |  |  |  |
Deferred Tax Liabilities, Net, Noncurrent |  |  | $ 3,900 |
Building and Building Improvements [Member] | Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life | 5 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 |  |  |

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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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