Other Assets Other assets other details (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Demo equipment depreciation expense	$ 0.0	$ 0.6	$ 0.6	$ 0.8