Product and Geographic Information Revenue from Product Market (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Revenue, Net	$ 110,840	$ 33,779	$ 254,491	$ 111,105
Printed Circuit Board [Member]
Revenue from External Customer [Line Items]
Revenue, Net	83,799	15,987	179,658	60,432
Component Test [Member] [Member]
Revenue from External Customer [Line Items]
Revenue, Net	7,473	5,407	23,331	14,999
Semiconductor [Member]
Revenue from External Customer [Line Items]
Revenue, Net	12,351	6,690	31,116	21,521
Industrial Machining [Member]
Revenue from External Customer [Line Items]
Revenue, Net	$ 7,217	$ 5,695
Industrial Machining [Member]
Revenue from External Customer [Line Items]
Revenue, Net			$ 20,386	$ 14,153