Segment Information - Product and Service and Product Group (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue from External Customer [Line Items]
Revenues	$ 49,964	$ 65,438	$ 93,763	$ 133,616
ATCA Platforms [Member]
Revenue from External Customer [Line Items]
Revenues	22,966	31,722	46,158	66,540
Software and Solutions [Member]
Revenue from External Customer [Line Items]
Revenues	10,400	12,612	18,241	24,261
Com Express and Rackmount Server [Member]
Revenue from External Customer [Line Items]
Revenues	13,456	14,218	23,917	28,845
Other Products [Member]
Revenue from External Customer [Line Items]
Revenues	$ 3,142	$ 6,886	$ 5,447	$ 13,970