Common Stock - Additional Information (Detail) (USD $)	Nov. 30, 2012	Feb. 29, 2012
Common Shares [Line Items]
Common Stock, Par Value	$ 0.02	$ 0.02
Common Stock, Shares Authorized	40,000,000	40,000,000
Common Stock, Shares Issued	19,053,051	19,030,983
Common Stock, Shares Outstanding	10,187,205	10,470,199