Shareholder's Equity - Additional Information (Detail) (USD $)	9 Months Ended
	Nov. 30, 2013 Director	Nov. 30, 2012	Sep. 01, 2011	Jul. 08, 2009
Stock Based Compensation [Line Items]
Total unrecognized compensation costs related to stock options granted	$ 10,900
Unrecognized stock option compensation cost is expected to be recognized over a period	2 years
Number of members of board of directors	3
Stock options granted to three members of board of directors	3,000
Authorized stock repurchase	1,632,500
Additional authorized stock repurchase				1,000,000
Number of shares repurchased	0	22,031
Average price of repurchase shares		$ 4.10
Remaining repurchase of shares authorized	705,106
Portion of company's net earning after tax			10.00%
General and Administrative Expense
Stock Based Compensation [Line Items]
Recognized general and administrative expenses	$ 5,900	$ 7,700