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Note 9 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2012
Operating Leases of Lessee Disclosure [Table Text Block]
   
Amount
 
Years ended December 31:
     
2013
  $ 10,804  
2014
    9,248  
2015
    7,718  
2016
    4,719  
2017
    2,914  
Thereafter
    5,638  
Total
  $ 41,041