Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 95,977	$ 101,484	$ 102,715	$ 98,623	$ 95,266	$ 91,971	$ 94,137	$ 104,587	$ 398,799	$ 385,961	$ 427,054
Asia
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									298,119	277,638	305,093
Europe
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									45,546	44,547	59,835
Americas
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									55,134	63,776	62,126
Product revenue - Distributors
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									330,719	297,736	310,163
Product revenue - Direct
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									49,749	58,766	80,541
Licensing and services revenue
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									$ 18,331	$ 29,459	$ 36,350