Related Parties - Schedule of Account Receivable and Payable of Related Party Transactions (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Accounts receivable	$ 6,082	$ 4,167
Accounts payable	10,983	9,469
Lite On Semiconductor
Related Party Transaction [Line Items]
Accounts receivable	72	55
Accounts payable	4,402	2,845
Keylink
Related Party Transaction [Line Items]
Accounts receivable	6,010	4,112
Accounts payable	5,181	5,147
Nuvoton
Related Party Transaction [Line Items]
Accounts payable	$ 1,400	$ 1,477