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Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets [Line Items]    
Long-lived assets, net $ 557 $ 591
UNITED STATES
    
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets [Line Items]    
Long-lived assets, net 526 582
International [Member]
    
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Long-Lived Assets [Line Items]    
Long-lived assets, net $ 31 $ 9