Income Taxes - Tax Credits and Carryforwards (Details) $ in Thousands	Dec. 28, 2019 USD ($)
California
Operating Loss Carryforwards [Line Items]
Research credits	$ 39,228
Singapore
Operating Loss Carryforwards [Line Items]
Singapore net operating loss carryforwards	8,340
Federal
Operating Loss Carryforwards [Line Items]
Federal research and development tax credit	37,494
Net operating loss carryforwards	14,589
Foreign tax credit carryforwards	1,134
Alternative minimum tax credits	195
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 243,934