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Concentration of Credit Risk, Significant Customers and Geographic Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Concentration Risk [Line Items] |  |  |  |  |
Net revenue | $ 101,533 | $ 104,175 | $ 212,360 | $ 193,016 |
Net Revenue [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 100.00% | 100.00% | 100.00% | 100.00% |
Net revenue | $ 101,533 | $ 104,175 | $ 212,360 | $ 193,016 |
Net Revenue [Member] | Asia [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 86.00% | 91.00% | 81.00% | 93.00% |
Net revenue | $ 87,289 | $ 94,823 | $ 172,103 | $ 179,131 |
Net Revenue [Member] | UNITED STATES |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 5.00% | 2.00% | 5.00% | 1.00% |
Net revenue | $ 4,636 | $ 2,095 | $ 9,831 | $ 2,240 |
Net Revenue [Member] | Rest of World [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 9.00% | 7.00% | 14.00% | 6.00% |
Net revenue | $ 9,608 | $ 7,257 | $ 30,426 | $ 11,645 |
Net Revenue [Member] | Geographic Concentration Risk [Member] | China [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 65.00% | 73.00% | 63.00% | 75.00% |
Long lived assets [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 100.00% |  | 100.00%
Long lived assets |  |  | $ 540,233 |  | $ 575,695
Long lived assets [Member] | UNITED STATES |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 84.00% |  | 84.00%
Long lived assets |  |  | $ 455,523 |  | $ 481,638
Long lived assets [Member] | Rest of World [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 0.00% |  | 0.00%
Long lived assets |  |  | $ 2,687 |  | $ 1,643
Long lived assets [Member] | SINGAPORE |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 15.00% |  | 16.00%
Long lived assets |  |  | $ 82,023 |  | $ 92,414
Vendor A [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 23.00% | 19.00% | 22.00% | 21.00% |
Vendor B [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 15.00% | 16.00% | 17.00% | 18.00% |
Vendor C [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  | 20.00% |  | 18.00% |
Vendor D [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 15.00% | 15.00% | 16.00% | 13.00% |
Vendor E [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 12.00% | 10.00% | 13.00% | 13.00% |
Customer A [Member] | Net Revenue [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 28.00% | 26.00% | 27.00% | 29.00% |
Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 23.00% |  |
Customer B [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  |  |  |  | 17.00%
Customer C [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  |  |  |  | 10.00%

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