Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Concentration of Credit Risk, Significant Customers and Geographic Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Concentration Risk [Line Items]          
Net revenue $ 82,507 $ 101,533 $ 167,142 $ 212,360  
Net Revenue [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 100.00% 100.00% 100.00% 100.00%  
Net revenue $ 82,507 $ 101,533 $ 167,142 $ 212,360  
Net Revenue [Member] | Asia [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 83.00% 86.00% 84.00% 81.00%  
Net revenue $ 68,319 $ 87,289 $ 139,867 $ 172,103  
Net Revenue [Member] | UNITED STATES          
Concentration Risk [Line Items]          
Concentration risk percentage 4.00% 5.00% 5.00% 5.00%  
Net revenue $ 3,775 $ 4,636 $ 8,127 $ 9,831  
Net Revenue [Member] | Rest of World [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 13.00% 9.00% 11.00% 14.00%  
Net revenue $ 10,413 $ 9,608 $ 19,148 $ 30,426  
Net Revenue [Member] | Geographic Concentration Risk [Member] | China [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 60.00% 65.00% 64.00% 63.00%  
Long lived assets [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage     100.00%   100.00%
Long lived assets     $ 491,034   $ 501,634
Long lived assets [Member] | UNITED STATES          
Concentration Risk [Line Items]          
Concentration risk percentage     85.00%   85.00%
Long lived assets     $ 416,736   $ 426,321
Long lived assets [Member] | Rest of World [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage     1.00%   1.00%
Long lived assets     $ 6,300   $ 3,368
Long lived assets [Member] | SINGAPORE          
Concentration Risk [Line Items]          
Concentration risk percentage     14.00%   14.00%
Long lived assets     $ 67,998   $ 71,945
Customer A [Member] | Net Revenue [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 12.00% 28.00% 12.00% 27.00%  
Customer B [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 18.00% 12.00% 18.00% 13.00%  
Vendor B [Member] | Supplier Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 18.00% 23.00% 13.00% 22.00%  
Vendor C [Member] | Supplier Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 13.00% 15.00% 13.00% 17.00%  
Vendor D [Member] | Supplier Concentration Risk [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 13.00% 15.00% 13.00% 16.00%