Inventories (Tables)

6 Months Ended

Jun. 30, 2012

Inventories [Abstract]

Component of inventories

	At
	June 30, 2012		December 31, 2011
Raw materials and sub-assemblies	$	23,629	$	24,963
Work in process		7,844		11,143
Consignment inventory		10,769		8,910
Finished goods		3,137		7,244
Inventories		45,379		52,260
Inventories-delivered systems		1,850		1,637
Total inventories	$	47,229	$	53,897