v3.10.0.1
Concentrations - Narrative (Details) - Customer Concentration Risk
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
One additional OEM customer | Sales Revenue, Net        
Concentration Risk [Line Items]        
Concentration risk, percentage     10.00%  
Supplier One | Material Purchases        
Concentration Risk [Line Items]        
Concentration risk, percentage 43.00%   56.00%  
Supplier Two | Material Purchases        
Concentration Risk [Line Items]        
Concentration risk, percentage 11.00%   10.00%  
Supplier Three | Material Purchases        
Concentration Risk [Line Items]        
Concentration risk, percentage   35.00%   28.00%
Supplier Four | Material Purchases        
Concentration Risk [Line Items]        
Concentration risk, percentage   15.00%   14.00%
Supplier Five | Material Purchases        
Concentration Risk [Line Items]        
Concentration risk, percentage   14.00%   11.00%