Loss Per Share - Computations for Basic and Diluted Loss Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Schedule Of Earnings Per Share By Common Class [Line Items]
Net loss	$ (6,208)	$ (7,999)	$ (12,516)	$ (10,523)
Average shares outstanding:
Basic	8,143	8,165	8,142	8,214
Effect of stock awards
Diluted	8,143	8,165	8,142	8,214
Loss per share:
Basic	$ (0.76)	$ (0.98)	$ (1.54)	$ (1.28)
Diluted	$ (0.76)	$ (0.98)	$ (1.54)	$ (1.28)