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Inventories | 6 Months Ended
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Apr. 30, 2021
Inventory Disclosure [Abstract] |
Inventories | Note 5. Inventories Inventories (short and long-term) as of April 30, 2021 and October 31, 2020 consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | April 30, | ​ | October 31,
​ |  | 2021 |  | 2020
Raw materials | ​ | $ | 27,075 | ​ | $ | 21,726
Work-in-process (1) | ​ | ​ | 36,431 | ​ | ​ | 38,231
Inventories | ​ | ​ | 63,506 | ​ | ​ | 59,957
Inventories - short-term | ​ | ​ | (58,920) | ​ | ​ | (50,971)
Inventories - long-term (2) | ​ | $ | 4,586 | ​ | $ | 8,986
(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 project asset construction or power plant orders or for use under the Company’s service agreements. Included in work-in-process as of April 30, 2021 and October 31, 2020 was $22.2 million and $19.6 million, respectively, of completed standard components and modules.
(2) | Long-term inventory includes modules that are contractually required to be segregated for use as exchange modules for specific project assets.
Raw materials consist mainly of various nickel powders and steels, various other components used in producing cell stacks and purchased components for balance of plant. Work-in-process inventory is comprised of material, labor, and overhead costs incurred to build fuel cell stacks and modules, which are subcomponents of a power platform. The Company incurred costs associated with excess plant capacity and manufacturing variances of $1.3 million and $2.7 million for the three months ended April 30, 2021 and 2020, respectively, and $3.4 million and $4.4 million for the six months ended April 30, 2021 and 2020, respectively, which were included within product cost of revenues on the Consolidated Statements of Operations and Comprehensive Loss.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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