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Note 11 - Income Taxes (Tables)
12 Months Ended
May 26, 2013
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   

Year ended

May 26, 2013

   

Year ended

May 27, 2012

   

Year ended

May 29, 2011

 

Current:

                       

Federal

  $ 2,808     $ 4,597     $ 881  

State

    (18 )     (586 )     176  

Foreign

    56       56        

Total

    2,846       4,067       1,057  

Deferred:

                       

Federal

    6,218       2,641       3,140  

State

    388       477       (16 )

Total

    6,606       3,118       3,124  

Income tax expense

  $ 9,452     $ 7,185     $ 4,181  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   

Year Ended

May 26, 2013

   

Year Ended

May 27, 2012

   

Year Ended

May 29, 2011

 

Provision at U.S. statutory rate (1)

  $ 11,214     $ 6,958     $ 2,835  

State income taxes, net of federal benefit

    731       451       213  

Goodwill impairment charge

                1,849  

Change in valuation allowance

    370       1       (7 )

Tax-exempt interest

          (40 )     (115 )

Tax credit carryforwards

    (801 )     (368 )     (637 )

Transaction costs

          322        

Domestic manufacturing deduction

    (172 )     (208 )      

Change in value of contingent consideration

    (1,450 )            

Other

    (440 )     69       43  

Total

  $ 9,452     $ 7,185     $ 4,181  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   

May 26, 2013

   

May 27, 2012

 

Deferred tax assets:

               

Net operating loss carryforwards

  $ 3,853     $ 3,954  

Accruals and reserves

    1,388       2,191  

Stock-based compensation

    621       981  

Research and AMT credit carryforwards

    486       328  

Other

    450       428  

Gross deferred tax assets

    6,798       7,882  

Valuation allowance

    (783 )     (419 )

Net deferred tax assets

    6,015       7,463  
                 

Deferred tax liabilities:

               

Basis difference in investment in non-public company

    (5,505 )     (2,510 )

Depreciation and amortization

    (5,822 )     (5,575 )

Goodwill and other indefinite life intangibles

    (17,160 )     (15,339 )

Deferred tax liabilities

    (28,487 )     (23,424 )
                 

Net deferred tax liabilities

  $ (22,472 )   $ (15,961 )
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
   

As of

 
   

May 26, 2013

   

May 27, 2012

   

May 29, 2011

 

Unrecognized tax benefits – beginning of the period

  $ 766     $ 760     $ 868  

Gross increases – tax positions in prior period

    103       1       280  

Gross decreases – tax positions in prior period

          (1 )     (310 )

Gross increases – current-period tax positions

    129       246       75  

Settlements

                 

Lapse of statute of limitations

          (240 )     (153 )

Unrecognized tax benefits – end of the period

  $ 998     $ 766     $ 760