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Note 2 - Restatement of Previously Reported Consolidated Financial Statements (Tables)
 3 Months Ended
Aug. 26, 2012
Adjustment [Member]
  
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]
Consolidated Statements of Income
 
As Reported
   
Adjustment
   
As Restated
 
Operating income
  $ 3,003     $ —     $ 3,003  
Dividend income
    281       —       281  
Interest income
    26       —       26  
Interest expense
    (541 )     —       (541 )
Other income
    1,359       2,900       4,259  
Net income before taxes
    4,128       2,900       7,028  
Income tax expense
    (1,492 )     (1,073 )     (2,565 )
Consolidated net income
    2,636       1,827       4,463  
Non controlling interest
    (97 )     —       (97 )
Net income applicable to Common Stockholders
  $ 2,539     $ 1,827     $ 4,366  
                         
Basic net income per share
  $ 0.10     $ 0.07     $ 0.17  
Diluted net income per share
  $ 0.10     $ 0.07     $ 0.17  
Adjustment [Member]
  
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]
Consolidated Balance Sheets
 
As Reported
   
Adjustment
   
As Restated
 
Investment in non-public company, fair value
  $ 22,896     $ 2,900     $ 25,796  
Total Assets
  $ 267,960     $ 2,900     $ 270,860  
Deferred taxes – noncurrent
  $ 18,906     $ 1,073     $ 19,979  
Retained earnings
  $ 32,361     $ 1,827     $ 34,188  
Total Stockholders’ Equity
  $ 153,287     $ 1,827     $ 155,114  
Total Equity
  $ 155,200     $ 1,827     $ 157,027  
Total Liabilities and Stockholders’ Equity
  $ 267,960     $ 2,900     $ 270,860