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Note 7 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
May 29, 2016
May 31, 2015
Deferred tax assets:    
Net operating loss carryforwards $ 3,030 $ 3,415
Accruals and reserves 1,836 1,964
Stock-based compensation 1,436 662
Research and AMT credit carryforwards 468 515
Other 926 966
Gross deferred tax assets 7,696 7,522
Valuation allowance (1,240) (1,234)
Net deferred tax assets 6,456 6,288
Deferred tax liabilities:    
Basis difference in investment in non-public company (11,125) (10,753)
Depreciation and amortization (9,758) (7,186)
Goodwill and other indefinite life intangibles (8,015) (20,578)
Deferred tax liabilities (28,898) (38,517)
Net deferred tax liabilities $ (22,442) $ (32,229)