Segment Disclosure (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Revenue Information by product line [Abstract]
Revenues	$ 25,182	[1]	$ 40,333	[1]
Systems [Member]
Revenue Information by product line [Abstract]
Revenues	13,271		28,692
Sub-systems [Member]
Revenue Information by product line [Abstract]
Revenues	$ 11,911		$ 11,641

[1] Includes related party amounts of $1,890 and $227 for the three months ended March 31, 2013 and 2012, respectively. See Note 12 for additional information on related par