Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jul. 31, 2012	Jul. 31, 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	$ 94.5
Valuation allowances against our entire net deferred federal tax assets	354.8		353.3
Recognized cumulative valuation allowances against state deferred tax assets	74.0
State tax deferred tax assets	$ 28.9
Number of states	20

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 43-49

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 17

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Balance Type:	credit
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