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Income Taxes (Details 8)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Operating Loss Carryforwards [Line Items]  
Tax effect $ 32,098
Taiwan operations [Member] | Expiration year 2016 to 2020 [Member]  
Operating Loss Carryforwards [Line Items]  
Deductible amount 78,349
Tax effect $ 13,319
Expiration year (in years) 2016~2020
Taiwan operations [Member] | Expiration year 2021 to 2025 [Member]  
Operating Loss Carryforwards [Line Items]  
Deductible amount $ 87,634
Tax effect $ 14,898
Expiration year (in years) 2021~2025
Hong Kong Operations [Member]  
Operating Loss Carryforwards [Line Items]  
Deductible amount $ 1,811
Tax effect $ 299
Expiration year (in years) Indefinitely
US operations [Member]  
Operating Loss Carryforwards [Line Items]  
Deductible amount $ 9,084
Tax effect $ 3,582
Expiration year (in years) 2024~2035