Operating Segments and Related Disclosures - Customers that Represented More than 10% of Net Sales (Detail) (Customers [Member], Sales Revenue, Net [Member])	3 Months Ended		9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Lockheed Martin [Member]
Revenue, Major Customer [Line Items]
Percentage of Net Sales	28.00%	19.00%	26.00%	26.00%
United Launch Alliance [Member]
Revenue, Major Customer [Line Items]
Percentage of Net Sales	27.00%	20.00%	26.00%	14.00%
Raytheon [Member]
Revenue, Major Customer [Line Items]
Percentage of Net Sales	15.00%	27.00%	17.00%	36.00%
NASA [Member]
Revenue, Major Customer [Line Items]
Percentage of Net Sales	11.00%	12.00%	12.00%
Maximum [Member] | NASA [Member]
Revenue, Major Customer [Line Items]
Percentage of Net Sales				10.00%