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Balance Sheet Components (Schedule of Estimated Amortization Expense Related to Intangibles) (Details) - USD ($)
$ in Thousands
Apr. 01, 2018
Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]    
2018 (remaining nine months) $ 6,857  
2019 7,544  
2020 6,622  
2021 1,413  
2022 13  
Net $ 22,449 $ 24,988