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Concentrations (Details) - customer
6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Net sales      
Concentration Risk      
Number of customers 2 1  
Net sales | Customer one      
Concentration Risk      
Customer's concentration risk percentage 36.00% 35.00%  
Net sales | Customer two      
Concentration Risk      
Customer's concentration risk percentage 10.00%    
Accounts receivable      
Concentration Risk      
Number of customers 1   1
Accounts receivable | Customer one      
Concentration Risk      
Customer's concentration risk percentage 45.00%   62.00%