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Note 5 - Income Taxes
 9 Months Ended
Mar. 01, 2015
Notes to Financial Statements  
Income Tax Disclosure [Text Block]
5.
Income Taxes
 
The provision for income taxes for the three and nine months ended March 1, 2015 was $2.3 million and $5.4 million, respectively. The effective tax rate for the nine months ended March 1, 2015 was 36%, compared to 35% for the first nine months of fiscal year 2014.
The effective tax rate for the nine months ended March 1, 2015 was higher than the statutory federal income tax rate of 35% primarily due to several factors, including state taxes, valuation allowance on the impairment of the investment in Aesthetic Sciences Corporation, and non-deductible stock-based compensation expense; partially offset by the domestic manufacturing deduction and state and federal research and development credits.
 
As of both March 1, 2015 and May 25, 2014, the Company had unrecognized tax benefits of approximately $1.0 million.  Included in the balance of unrecognized tax benefits as of March 1, 2015 and May 25, 2014 is approximately $800,000 and $807,000, respectively, of tax benefits that, if recognized, would result in an adjustment to the Company’s effective tax rate. 
The Company does not expect its unrecognized tax benefits to change significantly within the next twelve months.
 
The Company has elected to classify interest and penalties related to uncertain tax positions as a component of its provision for income taxes.  The Company has accrued an insignificant amount of interest and penalties relating to the income tax on the unrecognized tax benefits as of March 1, 2015 and May 25, 2014.
 
Due to tax attribute carryforwards, the Company is subject to examination for tax years 1997 forward for U.S. tax purposes. The Company is also subject to examination in various state jurisdictions for tax years 1998 forward, none of which were individually material.