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Note 6 - Concentration of Revenue
9 Months Ended
Sep. 30, 2013
Risks and Uncertainties [Abstract]  
Concentration Risk Disclosure [Text Block]

6.     Concentration of Revenue The 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 Sept. 30,

   

Nine Months Ended Sept. 30,

 

(unaudited)

 

2013

   

2012

   

2013

   

2012

 

ChemFree Customer A

    16.0 %     29.0 %     22.0 %     29.0 %

ChemFree Customer B

    --       10.0 %     --       10.0 %

ChemFree Customer C

    28.0 %     11.5 %     18.0 %     12.9 %