Other Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Disclosure Other Assets [Abstract]
Consignment and demo equipment, net	$ 7,164	$ 7,242	$ 7,164
Long term deposits	2,376	2,543	2,376
Other	15	2,521	15
Other assets	13,211	12,626	13,211
Schedule of Cost-method Investments [Line Items]
Demo equipment depreciation expense		500	600
Other than temporary impairment of cost based investments	4,300	0	4,263	$ 9,703
Accounts Receivable, Net, Noncurrent	$ 3,656	$ 320	$ 3,656
Class D Preferred Stock | Omni Guide, Inc.
Disclosure Other Assets [Abstract]
Minority equity investment
Schedule of Cost-method Investments [Line Items]
Minority equity investment
Class E Preferred Stock | Omni Guide, Inc.
Disclosure Other Assets [Abstract]
Minority equity investment
Schedule of Cost-method Investments [Line Items]
Minority equity investment