Share-Based Compensation - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Apr. 02, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 4,613	$ 6,437	$ 4,232
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	277	503	445
Selling, General and Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	3,657	5,197	3,004
Research and Development Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 679	$ 737	$ 783