XML 71 R60.htm IDEA: XBRL DOCUMENT v3.10.0.1
Concentration of Credit Risk - Additional Information (Details) - Vendor
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
China        
Concentration Risk [Line Items]        
Number of vendors 2 2 2 2
Customer Concentration Risk | Net Revenue        
Concentration Risk [Line Items]        
Concentration risk percentage 10.00% 10.00% 10.00% 10.00%
Customer Concentration Risk | Net Revenue | China        
Concentration Risk [Line Items]        
Concentration risk percentage 76.00% 65.00% 70.00% 68.00%
Customer Concentration Risk | Trade Accounts Receivable        
Concentration Risk [Line Items]        
Concentration risk percentage 10.00% 10.00% 10.00% 10.00%