Stock Option Plans - Summary of Company's Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, beginning shares	1,958,000
Granted, shares	0
Exercised, shares	0	0
Forfeited, shares	0
Expired, shares	177,000
Outstanding, ending shares	1,781,000	1,958,000
Exercisable, shares	1,314,000
Vested and expected to vest, shares	1,765,000
Weighted Average Exercise Price, Outstanding beginning	$ 9.54
Weighted Average Exercise Price, Granted	0
Weighted Average Exercise Price, Exercised	0
Weighted Average Exercise Price, Forfeited	0
Weighted Average Exercise Price, Expired	12.23
Weighted Average Exercise Price, Outstanding ending	9.27	$ 9.54
Weighted Average Exercise Price, Exercisable	9.29
Weighted Average Exercise Price, Vested and expected to vest	$ 8.01
Weighted Average Remaining Contractual Term, outstanding	5 years 10 months 24 days	6 years 3 months 22 days
Weighted Average Remaining Contractual Term, exercisable	4 years 11 months 23 days
Weighted Average Remaining Contractual Term, Vested and expected to vest	5 years 10 months 28 days
Aggregate Intrinsic Value, Outstanding	$ 778
Aggregate Intrinsic Value, Exercisable	283
Aggregate Intrinsic Value, Vested and expected to vest	$ 754