Quarterly report pursuant to Section 13 or 15(d)

Major Customers and Vendors (Details)

v3.8.0.1
Major Customers and Vendors (Details)
 3 Months Ended
Mar. 31, 2018
customer
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Mar. 31, 2017
customer
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Purchases | Vendor concentration risk    
Significant Customers and Vendors    
Number of vendors | item 2 2
Purchases | Customer one | Vendor concentration risk    
Significant Customers and Vendors    
Percentage of concentration risk 31.70% 30.80%
Purchases | Customer two | Vendor concentration risk    
Significant Customers and Vendors    
Percentage of concentration risk 14.70% 13.40%
Net sales | Customer concentration risk    
Significant Customers and Vendors    
Number of customers 2 2
Net sales | Customer one | Customer concentration risk    
Significant Customers and Vendors    
Percentage of concentration risk 25.90% 20.40%
Net sales | Customer two | Customer concentration risk    
Significant Customers and Vendors    
Percentage of concentration risk 18.20% 19.10%
Net accounts receivable | Customer concentration risk    
Significant Customers and Vendors    
Number of customers 2  
Net accounts receivable | Customer one | Customer concentration risk    
Significant Customers and Vendors    
Percentage of concentration risk 34.60%  
Net accounts receivable | Customer two | Customer concentration risk    
Significant Customers and Vendors    
Percentage of concentration risk 13.50%