Balance Sheet Components - Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Sep. 25, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Operating lease liability	$ 23,833	$ 25,766
Deferred revenue	6,921	6,333
Others	10,450	9,155
Other Liabilities, Noncurrent	$ 41,204	$ 41,254