Customers Comprising Ten Percent or more Revenues (Detail)	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Revenue, Major Customer [Line Items]
Revenue from Customers	38.00%	39.00%
Percent of company revenue	10.00%
ACS | Sierra Nevada Corporation
Revenue, Major Customer [Line Items]
Revenue from Customers	14.00%
ACS | Raytheon Company
Revenue, Major Customer [Line Items]
Revenue from Customers	12.00%	21.00%
ACS | Northrop Grumman Corporation
Revenue, Major Customer [Line Items]
Revenue from Customers	12.00%	18.00%