Inventories (Tables)

3 Months Ended

Mar. 29, 2014

Inventory Disclosure [Abstract]

Component of inventories

Inventories are stated at the lower of standard cost (which approximates actual cost on a first-in, first-out basis) or market. Inventories consist of the following (in thousands):

	At
	March 29, 2014		December 28, 2013
Raw materials and sub-assemblies	$	21,061	$	19,655
Work in process	8,917		7,597
Finished goods	7,877		7,268
Inventories	37,855		34,520
Inventories-delivered systems	2,249		6,901
Total inventories	$	40,104	$	41,421