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Note 6 - Concentration of Revenue
6 Months Ended
Jun. 30, 2014
Risks and Uncertainties [Abstract]  
Concentration Risk Disclosure [Text Block]

6.

Concentration of RevenueThe following table indicates the percentage of consolidated revenue represented by each customer for any period in which such customer represented more than 10% of consolidated revenue.


   

Three Months Ended June 30,

   

Six Months Ended June 30,

 

(unaudited)

 

2014

   

2013

   

2014

   

2013

 

ChemFree Customer A

    22%       20%       21%       25%  

ChemFree Customer B

    15%       12%       16%       12%  

ChemFree Customer C

    --       11%       1%       11%  

ChemFree Customer D

    10%       --       11%       --