Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended							12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2014 Restricted Stock	Jan. 31, 2013 Restricted Stock	Jan. 31, 2012 Restricted Stock	Jan. 31, 2011 Restricted Stock	Jan. 31, 2014 Range One	Jan. 31, 2014 Range Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years			2 years
Expiration period	10 years
Total intrinsic value of stock options	$ 4,000	$ 0	$ 7,000
Total fair value of stock option granted	18,000	129,000	19,000
Total fair value of stock option shares vested	$ 162,000	$ 210,000	$ 241,000
Number of option shares, unvested	157,054	309,994				78,750	315,282
Weighted average exercise price, unvested	$ 3.63	$ 3.90				$ 6.45	$ 5.83
Exercisable and unexercisable, price range per share, lower limit								$ 1.69	$ 5.00
Exercisable and unexercisable, price range per share, upper limit								$ 4.99	$ 8.70
Number of options exercisable	363,723
Weighted average exercise price of options exercisable	$ 4.97