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Note 2 - Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2011
Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block]
Income statement data
 
2011
   
2010
 
             
Revenue
  $ 61,402     $ 52,656  
Gross profit
    14,219       13,988  
Net income
    6,261       6,018  
Equity in earnings of affiliated companies
    1,615       2,677