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Note 13 - Income Taxes (Details Textual) - USD ($) | Sep. 26, 2021 | Sep. 27, 2020
--- | --- | ---
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 1,033,000 |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 1,393,000 | $ 1,000,000
Deferred Tax Asset, Interest Carryforward | 0 | 5,383,000
Deferred Tax Assets, Operating Loss Carryforwards, Total | 26,999,000 | 28,240,000
State and Local Jurisdiction [Member] |  |
Unrecognized Tax Benefits Related to Net Operating Loss | 10,984,000 | $ 10,319,000
Operating Loss Carryforwards, Total | 45,160,000 |
Deferred Tax Assets, Operating Loss Carryforwards, Total | $ 35,676,000 |

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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible interest carryforward. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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