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Other Assets, net (Details) (USD $)
Apr. 30, 2013
Oct. 31, 2012
Other Assets, net [Abstract]    
Long-term stack residual value $ 12,003,000 [1] $ 14,316,000 [1]
Other Assets 965,000 [2] 1,870,000 [2]
Other assets, net 12,968,000 16,186,000
Accumulated depreciation on long-term stacks $ 9,500,000 $ 7,600,000
[1] Relates to stack replacements performed under the Company's SA's. The cost of the stack replacement is recorded as a long term asset and is depreciated over its expected life. If the Company does not obtain rights to title from the customer, the cost of the stack is expensed at the time of restack. Accumulated depreciation was $9.5 million and $7.6 million for the periods ended April 30, 2013 and October 31, 2012, respectively.
[2] Includes security deposits, notes receivable and interest receivable.