Other Current Assets (Details) - USD ($) $ in Thousands		Jul. 31, 2017	Oct. 31, 2016
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Advance payments to vendors	[1]	$ 800	$ 1,247
Deferred finance costs	[2]	129	152
Notes receivable	[3]		1,007
Prepaid expenses and other	[4]	5,082	7,775
Other current assets		$ 6,011	$ 10,181

[1] Advance payments to vendors relate to payments for inventory purchases ahead of receipt.

[2] Represents the current portion of direct deferred finance costs that relate primarily to securing a $40.0 million loan facility with NRG which is being amortized over the five-year life of the facility.

[3] Notes receivable were included in the consideration paid for the acquired fuel cell power plant discussed in Note 6.

[4] Primarily relates to other prepaid vendor expenses including insurance, rent and lease payments.