Stock-Based Compensation - Summary of Stock Option Plans (Detail) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Summary of stock option plans
Options Outstanding, Beginning Balance	782,443	655,083	777,193
Granted, Options	10,120	140,420	10,120
Exercised, Options	(25,000)		(12,530)
Forfeited and expired, Options	(246,786)	(13,060)	(119,700)
Options Outstanding, Ending Balance	520,777	782,443	655,083
Outstanding Weighted Average Exercise Price, Beginning Balance	$ 4.21	$ 4.68	$ 4.54
Granted, Weighted Average Exercise Price	$ 3.85	$ 2.08	$ 4.06
Exercised, Weighted Average Exercise Price	$ 2.30		$ 2.99
Forfeited and expired, Weighted Average Exercise Price	$ 3.63	$ 5.17	$ 3.88
Outstanding Weighted Average Exercise Price, Ending Balance	$ 4.57	$ 4.21	$ 4.68