Summary of Activity for Non-vested Shares (Restricted Shares) (Detail) (Employee Stock Plan, 2006 Plan, USD $)	12 Months Ended
	Jan. 31, 2015
Restricted stocks
Number of Shares
Restricted shares outstanding at beginning of year	2,017,940
Shares granted	115,166
Restricted shares vested	(352,848)
Restricted shares canceled	(94,968)
Weighted-average Grant-Date Fair value
Restricted shares outstanding at beginning of year	$ 5.01	[1]
Shares granted	$ 5.31	[1]
Restricted shares vested	$ 4.77	[1]
Restricted shares canceled	$ 5.00	[1]
Deferred Stock
Number of Shares
Shares granted	11,238	[2]
Weighted-average Grant-Date Fair value
Shares granted	$ 5.22	[1],[2]
Restricted And Deferred Shares
Number of Shares
Restricted and Deferred shares outstanding at end of year	1,696,528
Weighted-average Grant-Date Fair value
Restricted and Deferred shares outstanding at end of year	$ 5.09	[1]

[1] The fair value of a restricted share is equal to the Company’s closing stock price on the date of grant.

[2] During fiscal 2014, the Company granted 11,238 shares of deferred stock, with a fair value of approximately $58,643, to a director as compensation in lieu of cash and in accordance with his irrevocable election. The shares of deferred stock, which have no continued service requirement, will vest three years from the date of grant. The Company recognized compensation expense in full on the date of grant.