Stock Option Activity under Nineteen Ninety Two Plan (Detail) (Employee Stock Plan, 1992 Plan, USD $)	12 Months Ended
	Jan. 31, 2015
Employee Stock Plan, 1992 Plan
Number of Shares
Outstanding options at beginning of year	911,775
Options canceled	(686,775)
Options exercised	(7,500)	[1]
Outstanding options at end of year	217,500
Options exercisable at end of year	217,500
Vested and expected to vest at end of year	217,500
Weighted-average exercise price per option
Outstanding options at beginning of year	$ 6.82
Options canceled	$ 6.77
Options exercised	$ 5.67	[1]
Outstanding options at end of year	$ 7.01
Options exercisable at end of year	$ 7.01
Vested and expected to vest at end of year	$ 7.01
Weighted-average remaining contractual term
Outstanding options at end of year	3 months 18 days
Options exercisable at end of year	3 months 18 days
Vested and expected to vest at end of year	3 months 18 days

[1] The majority of outstanding options were out-of-the-money at January 31, 2015; therefore, the intrinsic value was immaterial.