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Note 8 - Segments and Geographic Information (Detail) - Summary of Geographic Sales (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Net Sales $ 7,672 $ 8,193 $ 12,974 $ 13,653
United States [Member]
       
Net Sales 6,937 6,960 11,724 11,513
International [Member]
       
Net Sales $ 735 $ 1,233 $ 1,250 $ 2,140