Operating Segment, Geographic Information and Significant Customers - Customers Comprising Ten Percent or more Revenues (Detail)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Revenue, Major Customer [Line Items]
Revenue from Customers (as a percentage)	37.00%	54.00%	51.00%
Lockheed Martin Corporation
Revenue, Major Customer [Line Items]
Revenue from Customers (as a percentage)	17.00%	15.00%	13.00%
Raytheon Company
Revenue, Major Customer [Line Items]
Revenue from Customers (as a percentage)	10.00%	22.00%	17.00%
Northrop Grumman Corporation
Revenue, Major Customer [Line Items]
Revenue from Customers (as a percentage)	10.00%	17.00%	21.00%