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Note 10 - Income Taxes (Details) - Deferred Tax Asset and Liability Components (USD $)
Sep. 27, 2014
Sep. 28, 2013
Deferred tax assets:    
Defined benefit plans $ 3,419,000 $ 3,245,000
Accrued expenses and asset reserves 2,782,000 2,206,000
Stock-based compensation 1,804,000 1,560,000
State net operating loss carryforwards and tax credits 908,000 1,441,000
Goodwill, amortizable for tax purposes 870,000 986,000
Valuation allowance (547,000) (730,000)
Deferred tax assets 9,236,000 8,708,000
Deferred tax liabilities:    
Plant and equipment (12,654,000) (12,607,000)
Prepaid insurance and other reserves (1,032,000) (650,000)
Deferred tax liabilities (13,686,000) (13,257,000)
Net deferred tax liability $ (4,450,000) $ (4,549,000)