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Commitments and Contingencies - Concentration of Credit Risk (Details) - Credit Concentration Risk - customer
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounts Receivable | Top Ten Customers      
Concentration of Credit Risk      
Number of top customers 10    
Percentage of net accounts receivable from top customers 73.00% 75.00%  
Accounts Receivable | Customer A      
Concentration of Credit Risk      
Concentration Risk (as a percent) 23.00%    
Accounts Receivable | Customer B      
Concentration of Credit Risk      
Concentration Risk (as a percent) 17.00%    
Accounts Receivable | Customer C      
Concentration of Credit Risk      
Concentration Risk (as a percent)   23.00%  
Net Sales | Customer A      
Concentration of Credit Risk      
Concentration Risk (as a percent) 13.00%    
Net Sales | Customer D      
Concentration of Credit Risk      
Concentration Risk (as a percent)   20.00%  
Net Sales | Customer E      
Concentration of Credit Risk      
Concentration Risk (as a percent)   12.00%  
Net Sales | Customer F      
Concentration of Credit Risk      
Concentration Risk (as a percent)     15.00%
Net Sales | Customer G      
Concentration of Credit Risk      
Concentration Risk (as a percent)     11.00%