Quarterly report pursuant to Section 13 or 15(d)

Major Customers and Vendors (Details)

v3.7.0.1
Major Customers and Vendors (Details) - customer
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Purchases | Vendor concentration risk        
Significant Customers and Vendors        
Number of vendors 2 2 2 2
Purchases | Vendor concentration risk | Major vendor one        
Significant Customers and Vendors        
Percentage of concentration risk 22.00% 17.40% 26.60% 23.90%
Purchases | Vendor concentration risk | Major vendor two        
Significant Customers and Vendors        
Percentage of concentration risk 14.90% 10.20% 14.10% 10.00%
Net sales | Customer concentration risk        
Significant Customers and Vendors        
Number of customers 2 2 2 2
Net sales | Customer one | Customer concentration risk        
Significant Customers and Vendors        
Percentage of concentration risk 21.50% 17.50% 21.60% 18.90%
Net sales | Customer two | Customer concentration risk        
Significant Customers and Vendors        
Percentage of concentration risk 17.40% 14.70% 19.70% 17.90%
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 9.20%      
Net accounts receivable | Customer two | Customer concentration risk        
Significant Customers and Vendors        
Percentage of concentration risk 22.80%