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Note 10 - Segments and Geographic Information (Details) - Summary of Geographic Sales (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Note 10 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items]        
Net Sales $ 6,699 $ 5,653 $ 11,618 $ 10,111
UNITED STATES
       
Note 10 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items]        
Net Sales 5,590 4,885 9,873 8,770
International [Member]
       
Note 10 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items]        
Net Sales $ 1,109 $ 768 $ 1,745 $ 1,341