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Note 7 - Customer and Supplier Concentration (Tables)
9 Months Ended
Sep. 30, 2014
Risks and Uncertainties [Abstract]  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
   
% of Total Accounts
Receivable
 
   
% of Net
Revenue
 
   
% of Net
Revenue
 
 
    September 30,     December 31,    
Three Months Ended
September 30,
   
Nine Months Ended
September 30,
 
   
2014
   
2013
   
2014
   
2013
   
2014
   
2013
 
Actavis, Inc.
    31 %     44 %     35 %     32 %     33 %     34 %
AmerisourceBergen
    10 %     11 %     14 %     15 %     15 %     15 %
Cardinal Health
    10 %     7 %     13 %     13 %     14 %     14 %
McKesson
    16 %     13 %     19 %     29 %     23 %     26 %