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Inventories - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Jan. 31, 2022	Jan. 31, 2021	Oct. 31, 2021
Inventory [Line Items]
Accrued product warranty cost	[1]	$ 297		$ 72
Computer and Office Equipment and Manufacturing Facilities [Member]
Inventory [Line Items]
Fixed asset impairment charge		1,000
Accrued product warranty cost		200
Costs of Revenues
Inventory [Line Items]
Excess plant capacity and manufacturing variances cost incurred		$ 3,200	$ 2,000
[1] The increase in accrued product warranty cost reflects the costs associated with the warranties provided under the POSCO Energy Settlement Agreement. Product warranty expense for the three months ended January 31, 2022 and 2021 was $0.2 million and $0.03 million, respectively.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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