Equity and Compensation Plans - Additional Information (Detail) (USD $)	12 Months Ended			36 Months Ended	12 Months Ended				1 Months Ended			12 Months Ended							12 Months Ended				12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011	Feb. 28, 2013	Feb. 28, 2013 September 2011 authorization	Sep. 14, 2011 September 2011 authorization	Feb. 28, 2013 September 2012 authorization	Sep. 27, 2012 September 2012 authorization	Dec. 31, 2012 Restricted Stock	Sep. 30, 2012 Restricted Stock	Mar. 31, 2012 Restricted Stock	Feb. 28, 2013 Restricted Stock	Feb. 28, 2013 Restricted Stock Maximum	Feb. 28, 2013 Restricted Stock Maximum Non-employee directors	Feb. 28, 2013 2012 Plan CompensationPlan	Feb. 28, 2013 1992 Plan	Feb. 28, 2013 1992 Plan Minimum	Feb. 28, 2013 1992 Plan Maximum	Feb. 28, 2013 1992 Plan Stock Options	Feb. 28, 2013 1992 Plan Restricted Stock Minimum	Feb. 28, 2013 1992 Plan Restricted Stock Maximum	Feb. 28, 2013 2001 Directors Plan	Feb. 28, 2013 Employee Stock Purchase Plan	Feb. 29, 2012 Employee Stock Purchase Plan	Feb. 28, 2011 Employee Stock Purchase Plan	Feb. 28, 2013 Employee Stock Purchase Plan Maximum	Feb. 29, 2012 Employee Stock Purchase Plan Maximum	Feb. 28, 2011 Employee Stock Purchase Plan Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of active equity award plan															1
Shares authorized under compensation plans															2,130,789	1,130,789						150,000
Share based payment award, award vesting period											1 year								3 years	3 years	5 years
Non-qualified stock options, expiration period from date of grant																	5 years	10 years
Stock options outstanding and exercisable																						3,537
Compensation expense	$ 600,000	$ 300,000	$ 200,000
Share based payment award, stock option granted	200,000	200,000	200,000							8,500
Share based payment award, value of each option granted	$ 4.24	$ 4.13	$ 0.93
Stock options exercised		22,304
Compensation expense related to unvested stock option grants not yet recognized	1,000,000			1,000,000
Intrinsic value of Options Exercised	0	100,000	0
Restricted stock granted, non employee directors									946	959	5,900	17,330
Compensation expense related to unvested restricted stock grants not yet recognized													100,000	100,000
Percentage of fair market value of stock price																							85.00%
Stock sold to employees																							756	4,787	4,096
Amount recorded as compensation expense																										$ 10,000	$ 10,000	$ 10,000
Number of shares authorized to be repurchased						1,000,000		1,000,000
Common stock repurchased	283,000	2,450,000	16,000	2,749,000	283,388
Common stock available for repurchase	364,000	648,000	1,098,000	364,000	364,476		1,000,000