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Note 9 - Income Taxes - Deferred Tax Asset and Liability Components (Details) - USD ($) | Sep. 29, 2018 | Sep. 30, 2017
--- | --- | ---
Defined benefit plans | $ 2,302,000 | $ 3,556,000
Accrued expenses and asset reserves | 1,939,000 | 3,069,000
Stock-based compensation | 1,120,000 | 1,907,000
State net operating loss carryforwards and tax credits | 233,000 | 284,000
Valuation allowance | (233,000) | (251,000)
Deferred tax assets | 5,361,000 | 8,565,000
Plant and equipment | (9,490,000) | (15,093,000)
Prepaid insurance and other reserves | (1,211,000) | (1,575,000)
Deferred tax liabilities | (10,701,000) | (16,668,000)
Net deferred tax liability | $ (5,340,000) | $ (8,103,000)

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from pension benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
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