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Note 15 - Supplemental Disclosures of Cash Flows (Tables)
6 Months Ended
Jun. 30, 2012
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
    Six-Month Period Ended:  
      June 30, 2012       July 1, 2011  
      (in thousands)  
Acquisition of SWH, Inc. through issuance of common stock
  $ 54,742     $ -  
Net unrealized gains on available-for-sale securities, net of taxes
  $ 382     $ 76