Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Oct. 31, 2011
Income Taxes (Textual) [Abstract]
State taxes net of federal benefit, percentage	6.50%	5.00%
Time period of forward tax losses	20
Tax loss carryforwards	$ 81.8
Valuation allowances against our entire net deferred federal tax assets	350.0		353.4
Recognized cumulative valuation allowances against state deferred tax assets	74.0
State tax deferred tax assets	$ 28.9
Number of states	20