Quarterly report pursuant to Section 13 or 15(d)

Major customers (Details)

v2.4.0.8
Major customers (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Purchases | Vendor concentration risk | One major vendor
       
Significant Customers        
Number of vendors 1 1 1 1
Percentage of concentration risk 10.40% 13.60% 10.00% 14.50%
Net sales | Customer concentration risk
       
Significant Customers        
Number of customers 3 3 3 3
Net sales | Customer one | Customer concentration risk
       
Significant Customers        
Percentage of concentration risk 15.00% 12.50% 15.00% 13.10%
Net sales | Customer two | Customer concentration risk
       
Significant Customers        
Percentage of concentration risk 15.00% 14.40% 14.30% 13.60%
Net sales | Customer three | Customer concentration risk
       
Significant Customers        
Percentage of concentration risk 11.80% 10.40% 11.90% 11.60%
Net accounts receivable | Customer one | Customer concentration risk
       
Significant Customers        
Percentage of concentration risk     11.70%  
Net accounts receivable | Customer two | Customer concentration risk
       
Significant Customers        
Percentage of concentration risk     13.90%  
Net accounts receivable | Customer three | Customer concentration risk
       
Significant Customers        
Percentage of concentration risk     10.50%