Shareholder's Equity - Additional Information (Detail) (USD $)	3 Months Ended
	May 31, 2014	May 31, 2013	Jan. 20, 2014
Stock Based Compensation [Line Items]
Total unrecognized compensation costs related to stock options granted	$ 6,400
Unrecognized stock option compensation cost is expected to be recognized over a period	1 year
Stock options granted to three members of board of directors	0	0
Authorized stock repurchase	1,632,500		1,500,000
Number of shares repurchased	524,694	0
Remaining repurchase of shares authorized	1,107,815
General and Administrative Expense
Stock Based Compensation [Line Items]
Recognized general and administrative expenses	$ 2,200	$ 1,800