Related Party Transactions - Schedule of Account Receivable and Payable of Related Party Transactions (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Lite On Semiconductor
Related Party Transaction [Line Items]
Accounts receivable	$ 301	$ 55
Accounts payable	4,333	2,845
Keylink
Related Party Transaction [Line Items]
Accounts receivable	5,394	4,112
Accounts payable	4,295	5,147
Nuvoton
Related Party Transaction [Line Items]
Accounts payable	$ 950	$ 1,477