Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	May. 31, 2015	May. 25, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 3,415	$ 3,630
Accruals and reserves	1,964	1,746
Stock-based compensation	662	723
Research and AMT credit carryforwards	515	495
Other	966	545
Gross deferred tax assets	7,522	7,139
Valuation allowance	(1,234)	(881)
Net deferred tax assets	6,288	6,258
Deferred tax liabilities:
Basis difference in investment in non-public company	(10,753)	(9,270)
Depreciation and amortization	(7,186)	(5,705)
Goodwill and other indefinite life intangibles	(20,578)	(19,360)
Deferred tax liabilities	(38,517)	(34,335)
Net deferred tax liabilities	$ (32,229)	$ (28,077)