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Concentration of Credit Risk and Major Customers (Tables)
3 Months Ended
Mar. 31, 2013
Concentration Of Credit Risk and Major Customers [Abstract]  
Schedule of Entity Wide Information by Major Customers by Reporting Segments [Table Text Block]

A relatively small number of customers account for a significant percentage of DCT’s sales. Customers that exceeded 10% of total revenues and accounts receivable were as follows:

 

 

    Three Months Ended
March 31,
 
    2013     2012  
Customer A     41 %     25 %
Customer B     16       10  
Customer C     14       21  
Customer D     10       19