Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	May 27, 2018	May 28, 2017
Deferred tax assets:
Accruals and reserves	$ 1,421	$ 3,242
Net operating loss carryforwards	1,955	2,766
Stock-based compensation	1,247	2,032
Research and AMT credit carryforwards	2,032	1,050
Other	427	661
Gross deferred tax assets	7,082	9,751
Valuation allowance	(1,337)	(1,325)
Net deferred tax assets	5,745	8,426
Deferred tax liabilities:
Basis difference in investment in non-public company	(3,722)	(11,495)
Goodwill and other indefinite life intangibles	(8,201)	(11,119)
Depreciation and amortization	(11,307)	(10,393)
Deferred tax liabilities	(23,230)	(33,007)
Net deferred tax liabilities	$ (17,485)	$ (24,581)