Quarterly report pursuant to Section 13 or 15(d)

Concentration of Credit Risk, Significant Customers and Geographic Information (Details)

v3.19.3
Concentration of Credit Risk, Significant Customers and Geographic Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Concentration Risk [Line Items]          
Net revenue $ 80,020 $ 85,010 $ 247,162 $ 297,370  
Net Revenue [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 100.00% 100.00% 100.00% 100.00%  
Net revenue $ 80,020 $ 85,010 $ 247,162 $ 297,370  
Net Revenue [Member] | Asia [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 85.00% 81.00% 84.00% 81.00%  
Net revenue $ 67,794 $ 68,750 $ 207,661 $ 240,853  
Net Revenue [Member] | UNITED STATES          
Concentration Risk [Line Items]          
Concentration risk percentage 3.00% 5.00% 4.00% 5.00%  
Net revenue $ 2,724 $ 4,474 $ 10,851 $ 14,305  
Net Revenue [Member] | Rest of World [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 12.00% 14.00% 12.00% 14.00%  
Net revenue $ 9,502 $ 11,786 $ 28,650 $ 42,212  
Net Revenue [Member] | Geographic Concentration Risk [Member] | China [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 52.00% 61.00% 60.00% 62.00%  
Long lived assets [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage     100.00%   100.00%
Long lived assets     $ 474,470   $ 501,634
Long lived assets [Member] | UNITED STATES          
Concentration Risk [Line Items]          
Concentration risk percentage     85.00%   85.00%
Long lived assets     $ 403,133   $ 426,321
Long lived assets [Member] | Rest of World [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage     1.00%   1.00%
Long lived assets     $ 5,572   $ 3,368
Long lived assets [Member] | SINGAPORE          
Concentration Risk [Line Items]          
Concentration risk percentage     14.00%   14.00%
Long lived assets     $ 65,765   $ 71,945
Customer B [Member] | Net Revenue [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 15.00%   13.00% 21.00%  
Customer A [Member] | Net Revenue [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 18.00%        
Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage     16.00%    
Customer C [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage         10.00%
Vendor A [Member] | Supplier Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 16.00% 11.00% 18.00% 12.00%  
Vendor B [Member] | Supplier Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 23.00% 12.00% 16.00% 19.00%  
Vendor C [Member] | Supplier Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 15.00% 24.00% 14.00% 19.00%  
Vendor D [Member] | Supplier Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 10.00% 13.00% 12.00% 15.00%