Income Taxes (Components of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Current
Federal	$ 0	$ 0	$ (459)
State	(275)	(173)	(393)
Current income tax benefit (expense)	(275)	(173)	(852)
Deferred
Federal	(1,192)	(4,581)	(3,482)
State	(223)	(1,235)	(648)
Total deferred income taxes	(1,415)	(5,816)	(4,130)
Change in Valuation Allowance	1,481	6,044	13,989
Deferred income taxes	66	228	9,859
Income tax expense (benefit)	$ (209)	$ 55	$ 9,007