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Inventories - Components of Inventories (Details) - USD ($) $ in Thousands		Oct. 31, 2018	Oct. 31, 2017
Inventory Disclosure [Abstract]
Raw materials		$ 24,467	$ 20,065
Work-in-process	[1]	29,108	54,431
Inventories		$ 53,575	$ 74,496
[1] Work-in-process includes the standard components of inventory used to build the typical modules or module components that are intended to be used in future power plant orders or to service our service agreements. Included in Work-in-process as of October 31, 2018 and 2017 is $19.0 million and $46.3 million, respectively, of completed standard components.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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