Other Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Mar. 31, 2018
Other Assets, Noncurrent Disclosure [Abstract]
Demo equipment depreciation expense	$ 400	$ 100
Consignment and demo equipment, net	4,972		$ 6,746
Long term deposits	3,205		3,232
Restricted Cash, Noncurrent	0		1,093
Other	2,933		3,709
Other assets	$ 11,110		$ 14,780