Inventories (Tables)

9 Months Ended

Sep. 29, 2012

Inventory Disclosure [Abstract]

Component of inventories

	At
	September 29, 2012		December 31, 2011
Raw materials and sub-assemblies	$	23,895	$	24,963
Work in process	6,345		11,143
Finished goods	12,814		16,154
Inventories	43,054		52,260
Inventories-delivered systems	1,674		1,637
Total inventories	$	44,728	$	53,897