Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Feb. 28, 2015 operating_segment	Feb. 28, 2014	Feb. 28, 2013	Jun. 02, 2012
Business Acquisition [Line Items]
Number of operating segments	2
Allowance for doubtful accounts, net	$ 700,000	$ 300,000	$ 300,000
Nuclear Logistics Incorporated [Member]
Business Acquisition [Line Items]
Future contingent consideration		$ 9,100,000		$ 20,000,000