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Note 11 - Income Taxes (Details) - Significant Components of Deferred Tax Assets and Liabilities (USD $)
May 26, 2013
May 27, 2012
Deferred tax assets:    
Net operating loss carryforwards $ 3,853,000 $ 3,954,000
Accruals and reserves 1,388,000 2,191,000
Stock-based compensation 621,000 981,000
Research and AMT credit carryforwards 486,000 328,000
Other 450,000 428,000
Gross deferred tax assets 6,798,000 7,882,000
Valuation allowance (783,000) (419,000)
Net deferred tax assets 6,015,000 7,463,000
Deferred tax liabilities:    
Basis difference in investment in non-public company (5,505,000) (2,510,000)
Depreciation and amortization (5,822,000) (5,575,000)
Goodwill and other indefinite life intangibles (17,160,000) (15,339,000)
Deferred tax liabilities (28,487,000) (23,424,000)
Net deferred tax liabilities $ (22,472,000) $ (15,961,000)