Other Assets, net (Details) (USD $)	Jul. 31, 2012		Oct. 31, 2011
Other Assets, net [Abstract]
long-term stack residual value	$ 14,530,000	[1]	$ 15,092,000	[1]
Other Assets, Miscellaneous, Noncurrent	1,142,000	[2]	1,199,000	[2]
Other Assets, Noncurrent	15,672,000		16,291,000
accumulated depreciation on long-term stacks	$ 6,900,000		$ 2,400,000

[1] Relates to stack replacements performed under the Company's service agreements. 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 $6.9 million and $2.4 million for the periods ended July 31, 2012 and October 31, 2011, respectively.

[2] Includes security deposits, notes receivable and interest receivable.