Operating Segment, Geographic Information and Significant Customers - Customers Comprising Ten Percent or more Revenues (Detail) - Sales Revenue, Net [Member]	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Revenue, Major Customer [Line Items]
Concentration risk, percentage	40.00%	39.00%	26.00%	52.00%
Customer Concentration Risk [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	55.00%	54.00%	54.00%	59.00%
Customer Concentration Risk [Member] | Raytheon Company [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	29.00%	36.00%	33.00%	35.00%
Customer Concentration Risk [Member] | Lockheed Martin Corporation [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	26.00%	18.00%	21.00%	24.00%