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Selected Quarterly Financial Data (Unaudited) - Customer and Supplier Concentration - Supplier and Product Concentrations (Details)
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
customer
product
item
Jun. 30, 2015
customer
item
Mar. 31, 2015
Distributor
product
item
Sep. 30, 2014
customer
product
item
Jun. 30, 2014
customer
item
Mar. 31, 2014
Distributor
item
Sep. 30, 2013
customer
Mar. 31, 2013
item
Jun. 30, 2015
customer
item
Jun. 30, 2014
customer
product
item
Sep. 30, 2015
customer
product
item
Sep. 30, 2014
customer
product
item
Sep. 30, 2013
customer
product
Dec. 31, 2015
item
Dec. 31, 2014
item
Dec. 31, 2013
product
item
Jun. 30, 2013
customer
Product Information [Line Items]                                  
Number of Customers Considered as Concentration Risks 3 3 3 3 3 3 3   3 3 3 3 3 3 3 3 3
Number of Suppliers Considered as Concentration Risks 0 0 0 0 0 0     0 0 0 0   1 1 1  
Number of Products Considered as Concentration Risks | product 0   1 0           1 0 0 1     1  
Customer Concentration Risk [Member]                                  
Product Information [Line Items]                                  
Number of Customers Considered as Concentration Risks           3                   3  
Concentration Risk, Percentage                           77.80%      
Product Concentration Risk [Member]                                  
Product Information [Line Items]                                  
Concentration Risk, Percentage           10.00%   11.00%                  
Number of Products Considered as Concentration Risks           1   1                  
Cost of Goods, Total [Member] | Supplier Concentration Risk [Member]                                  
Product Information [Line Items]                                  
Concentration Risk, Percentage             14.00%                    
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]                                  
Product Information [Line Items]                                  
Concentration Risk, Percentage 66.00%     43.00%             69.00% 46.00%   70.00% 61.90% 40.90%  
Sales Revenue, Net [Member] | Product Concentration Risk [Member]                                  
Product Information [Line Items]                                  
Concentration Risk, Percentage         12.00% 10.00% 13.00%     12.00%     12.00%     12.00%