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Note 7 - Income Taxes (Details Textual) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Apr. 29, 2017 | Apr. 30, 2016 | May 02, 2015 | May 03, 2014
Unrecognized Tax Benefits | $ 1,743,000 | $ 1,678,000 | $ 1,801,000 | $ 2,123,000
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions | 66,000 |  |  |
Changes in IncomeTax if All Uncertain Tax Positions Prevail | 1,200,000 |  |  |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 239,000 |  |  |
Unrecognized Tax Benefits, Period Increase (Decrease) | $ 12,000 |  |  |

X
- Definition The total amount of future income tax change that would occur if all uncertain tax positions prevail. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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X
- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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