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Note 9 - Income Taxes - Deferred Tax Asset and Liability Components (Details) - USD ($)
Sep. 30, 2017
Oct. 01, 2016
Defined benefit plans $ 3,556,000 $ 3,497,000
Accrued expenses and asset reserves 3,069,000 2,942,000
Stock-based compensation 1,907,000 1,652,000
State net operating loss carryforwards and tax credits 284,000 354,000
Goodwill, amortizable for tax purposes 277,000
Valuation allowance (251,000) (280,000)
Deferred tax assets 8,565,000 8,442,000
Plant and equipment (15,093,000) (12,915,000)
Prepaid insurance and other reserves (1,575,000) (999,000)
Deferred tax liabilities (16,668,000) (13,914,000)
Net deferred tax liability $ (8,103,000) $ (5,472,000)