Options Outstanding and Exercisable (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Feb. 28, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options Outstanding	72
Options Outstanding Weighted Average Remaining Contractual Life (in years)	3 years 10 months 24 days
Options Outstanding Weighted Average Exercise Price	$ 4.37
Number of options Exercisable	53
Options Exercisable Weighted Average Exercise Price	$ 4.56
$3.20 - 3.27
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range exercise prices	$ 3.20
Upper ranges of exercise prices	$ 3.27
Number of options Outstanding	7
Options Outstanding Weighted Average Remaining Contractual Life (in years)	4 years 3 months 18 days
Options Outstanding Weighted Average Exercise Price	$ 3.20
Number of options Exercisable	7
Options Exercisable Weighted Average Exercise Price	$ 3.20
3.59 - 3.65
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range exercise prices	$ 3.59
Upper ranges of exercise prices	$ 3.65
Number of options Outstanding	27
Options Outstanding Weighted Average Remaining Contractual Life (in years)	3 years 1 month 6 days
Options Outstanding Weighted Average Exercise Price	$ 3.61
Number of options Exercisable	18
Options Exercisable Weighted Average Exercise Price	$ 3.62
4.00 - 4.20
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range exercise prices	$ 4.00
Upper ranges of exercise prices	$ 4.20
Number of options Outstanding	27
Options Outstanding Weighted Average Remaining Contractual Life (in years)	5 years 1 month 6 days
Options Outstanding Weighted Average Exercise Price	$ 4.07
Number of options Exercisable	17
Options Exercisable Weighted Average Exercise Price	$ 4.09
7.65 - 7.71
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range exercise prices	$ 7.65
Upper ranges of exercise prices	$ 7.71
Number of options Outstanding	11
Options Outstanding Weighted Average Remaining Contractual Life (in years)	2 years 9 months 18 days
Options Outstanding Weighted Average Exercise Price	$ 7.68
Number of options Exercisable	11
Options Exercisable Weighted Average Exercise Price	$ 7.68