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Note 7 - Income Taxes
 9 Months Ended
Feb. 26, 2012
Notes To Financial Statements  
Income Tax Disclosure [Text Block]
  7.           Income Taxes

The provision for income taxes for the three and nine months ended February 26, 2012 was $2.9 million and $6.1 million, respectively. The effective tax rate for both the three and nine months ended February 26, 2012 was 38% compared to 37% for the same periods in fiscal year 2011. The effective tax rate for the three and nine months ended February 26, 2012 differs from the statutory federal income tax rate of 35% as a result of several factors, including state taxes, non-deductible stock-based compensation expense, tax exempt interest and the benefit of federal and state research and development credits.  

As of May 29, 2011, the Company had unrecognized tax benefits of approximately $760,000.  Included in the balance of unrecognized tax benefits as of May 29, 2011 is approximately $601,000 of tax benefits that, if recognized, would result in an adjustment to the Company’s effective tax rate. The Company expects its unrecognized tax benefits to change by $240,000 within the next twelve months related to the expiration of tax attributes.

            In accordance with accounting guidance, the Company has decided 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 February 26, 2012 and May 29, 2011.

Due to tax attribute carry forwards, the Company is subject to examination for tax years 1996 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 are individually significant.