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Note 11 - Business Segment Information (Details) - Long-lived Assets by Geographic Area (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Note 11 - Business Segment Information (Details) - Long-lived Assets by Geographic Area [Line Items]    
Long-lived assets $ 30,661 $ 19,832
United States [Member]
    
Note 11 - Business Segment Information (Details) - Long-lived Assets by Geographic Area [Line Items]    
Long-lived assets 7,135 6,207
China [Member]
    
Note 11 - Business Segment Information (Details) - Long-lived Assets by Geographic Area [Line Items]    
Long-lived assets $ 23,526 $ 13,625