Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	May 28, 2017	May 29, 2016
Deferred tax assets:
Accruals and reserves	$ 3,242	$ 1,836
Net operating loss carryforwards	2,766	3,030
Stock-based compensation	2,032	1,436
Research and AMT credit carryforwards	1,050	468
Other	661	926
Gross deferred tax assets	9,751	7,696
Valuation allowance	(1,325)	(1,240)
Net deferred tax assets	8,426	6,456
Deferred tax liabilities:
Basis difference in investment in non-public company	(11,495)	(11,125)
Goodwill and other indefinite life intangibles	(11,119)	(8,015)
Depreciation and amortization	(10,393)	(9,758)
Deferred tax liabilities	(33,007)	(28,898)
Net deferred tax liabilities	$ (24,581)	$ (22,442)