Basis of Presentation and Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Schedule of Derivative Instruments

We mitigate foreign currency exchange rate risk by entering into foreign currency forward exchange contracts, details of which are presented in the following table:

	June 30, 2018		December 30, 2017
Total cost of contracts for Japanese yen (in thousands)	$	1,031	$	2,204
Number of contracts	1		2
Settlement month	June 2019		June 2018

Schedules of Revenue Concentration of Risk

Revenue attributable to distributors as a percentage of total revenue is presented in the following table:

	Three Months Ended				Six Months Ended
	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
Revenue attributable to distributors*	86	%	76	%	87	%	73	%

* During the first quarter of 2018, we updated our channel categories to group all forms of distribution into a single channel. Prior periods have been reclassified to match the current period presentation.

The percentage of total revenue, with end customers known, attributable to our top five end customers and largest end customer is presented in the following table:

	Three Months Ended				Six Months Ended
	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
Revenue attributable to top five end customers	17	%	27	%	17	%	32	%
Revenue attributable to largest end customer	5	%	9	%	5	%	10	%