Leases Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2012	Oct. 31, 2012 Hopper Cars [Member]	Oct. 31, 2012 Rail Cars [Member]	Oct. 31, 2012 Hopper Cars [Member]	Oct. 31, 2012 Rail Cars [Member]	Oct. 31, 2012 Hopper Cars [Member]	Oct. 31, 2012 Rail Cars [Member]	Oct. 31, 2011 Rail Cars [Member]	Oct. 31, 2010 Rail Cars [Member]	Oct. 31, 2012 Hopper Cars [Member]	Oct. 31, 2011 Hopper Cars [Member]	Oct. 31, 2010 Hopper Cars [Member]	Oct. 31, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member]	Oct. 31, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member]	Oct. 31, 2012 Fair Value, Measurements, Recurring [Member]	Oct. 31, 2011 Fair Value, Measurements, Recurring [Member]	Oct. 31, 2012 Fair Value, Inputs, Level 1 [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 1 [Member]	Oct. 31, 2012 Fair Value, Inputs, Level 2 [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 2 [Member]	Oct. 31, 2012 Fair Value, Inputs, Level 3 [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 3 [Member]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 1,582,614	$ 1,582,614
Operating Leases, Future Minimum Payments, Due in Two Years	1,307,919	1,307,919
Operating Leases, Future Minimum Payments, Due in Three Years	1,034,139	1,034,139
Operating Leases, Future Minimum Payments, Due in Four Years	343,990	343,990
Operating Leases, Future Minimum Payments, Due in Five Years	127,504	127,504
Operating Leases, Future Minimum Payments, Due Thereafter	60,816	60,816
Operating Leases, Future Minimum Payments Due	4,456,982	4,456,982
Derivative Liabilities														45,563	404,050	45,563	404,050	45,563	404,050	0	0	0	0
Operating Leases, Rent Expense, Net		36,000	75	177	620	89,000	0.03
Contract Length	5 years
Operating Leases, Rent Expense								$ 1,278,000	$ 1,171,000	$ 1,058,000	$ 552,000	$ 553,000	$ 604,000