Segment Information - Product and Service and Product Group (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue from External Customer [Line Items]
Revenues	$ 54,109	$ 63,725	$ 187,725	$ 216,796
ATCA Platforms [Member]
Revenue from External Customer [Line Items]
Revenues	27,744	27,687	94,284	101,869
Software and Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	9,563	11,584	33,824	39,746
Com Express and Rackmount Server [Member]
Revenue from External Customer [Line Items]
Revenues	13,380	13,861	42,225	37,963
Other Products [Member]
Revenue from External Customer [Line Items]
Revenues	$ 3,422	$ 10,593	$ 17,392	$ 37,218