Segment Disclosure (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Revenue Information by product line [Abstract]
Revenues	$ 24,836	[1]	$ 40,822	[1]	$ 50,018	[1]	$ 81,155	[1]
Systems [Member]
Revenue Information by product line [Abstract]
Revenues	13,263		28,028		26,534		56,720
Sub-systems [Member]
Revenue Information by product line [Abstract]
Revenues	$ 11,573		$ 12,794		$ 23,484		$ 24,435

[1] Includes related party amounts of $4,187 and $1,532 for the three months ended June 30, 2013 and 2012, respectively, and $6,077 and $1,759 for the six months ended June 30, 2013 and 2012, respectively. See Note 12 for additional information on related par