Segment Information Product and Service and Product Group (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended			3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012 Hardware [Member]	Sep. 30, 2011 Hardware [Member]	Sep. 30, 2012 Hardware [Member]	Sep. 30, 2012 Software royalties and licenses [Member]	Sep. 30, 2011 Software royalties and licenses [Member]	Sep. 30, 2012 Software royalties and licenses [Member]	Sep. 30, 2012 Technical support services [Member]	Sep. 30, 2011 Technical support services [Member]	Sep. 30, 2012 Technical support services [Member]	Sep. 30, 2012 Engineering and other services [Member]	Sep. 30, 2011 Engineering and other services [Member]	Sep. 30, 2012 Engineering and other services [Member]	Sep. 30, 2012 ATCA Platforms [Member]	Sep. 30, 2011 ATCA Platforms [Member]	Sep. 30, 2012 ATCA Platforms [Member]	Sep. 30, 2012 Com Express and Rackmount Server [Member]	Sep. 30, 2011 Com Express and Rackmount Server [Member]	Sep. 30, 2012 Com Express and Rackmount Server [Member]	Sep. 30, 2012 Software and Solutions [Member]	Sep. 30, 2011 Software and Solutions [Member]	Sep. 30, 2012 Software and Solutions [Member]	Sep. 30, 2012 Other Products [Member]	Sep. 30, 2011 Other Products [Member]	Sep. 30, 2012 Other Products [Member]
Revenue from External Customer [Line Items]
Revenues	$ 69,300	$ 63,725	$ 77,584	$ 75,487	$ 79,506	$ 97,876	$ 79,856	$ 73,627	$ 286,096	$ 330,865	$ 284,311	$ 235,870	$ 300,505	$ 257,533	$ 23,162	$ 13,952	$ 16,614	$ 14,295	$ 6,635	$ 4,980	$ 12,769	$ 9,773	$ 5,184	$ 136,572	$ 132,530	$ 85,822	$ 49,538	$ 56,848	$ 53,149	$ 52,666	$ 36,938	$ 32,256	$ 47,320	$ 104,549	$ 113,084