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Note 11 - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $)
May 25, 2014
May 26, 2013
Deferred tax assets:    
Net operating loss carryforwards $ 3,630,000 $ 3,853,000
Accruals and reserves 1,746,000 1,388,000
Stock-based compensation 723,000 621,000
Research and AMT credit carryforwards 495,000 486,000
Other 545,000 450,000
Gross deferred tax assets 7,139,000 6,798,000
Valuation allowance (881,000) (783,000)
Net deferred tax assets 6,258,000 6,015,000
Deferred tax liabilities:    
Basis difference in investment in non-public company (9,270,000) (5,505,000)
Depreciation and amortization (5,705,000) (5,822,000)
Goodwill and other indefinite life intangibles (19,360,000) (17,160,000)
Deferred tax liabilities (34,335,000) (28,487,000)
Net deferred tax liabilities $ (28,077,000) $ (22,472,000)