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Other Assets (Tables) | 6 Months Ended
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Apr. 30, 2021
Other Assets Noncurrent [Abstract] |
Schedule of Other Assets | Other assets as of April 30, 2021 and October 31, 2020 consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | April 30, | ​ | October 31,
​ |  | 2021 |  | 2020
Long-term stack residual value (1) | ​ | $ | 702 | ​ | $ | 890
Long-term unbilled receivables (2) | ​ | ​ | 9,881 | ​ | ​ | 8,856
Other (3) | ​ | ​ | 5,943 | ​ | ​ | 5,593
Other assets | ​ | $ | 16,526 | ​ | $ | 15,339
(1) | Relates to estimated residual value for module exchanges performed under the Company’s service agreements where the useful life extends beyond the contractual term of the service agreement and the Company obtains title for the module from the customer upon expiration or non-renewal of the service agreement. If the Company does not obtain rights to title from the customer, the full cost of the module is expensed at the time of the module exchange.
(2) | Represents unbilled receivables that relate to revenue recognized on customer contracts that will be billed in future periods in excess of 12 months from the balance sheet date.
(3) | The Company entered into an agreement with one of its customers on June 29, 2016 which includes payments for the purchase of the customer’s power platforms by the Company at the end of the term of the agreement. The payments are to be made in installments over the term of the agreement and the total amount paid as of each of April 30, 2021 and October 31, 2020 was $2.4 million. Also included within “Other” are long-term security deposits and prepaid withholding taxes on deferred revenue as of April 30, 2021 and October 31, 2020.

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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