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Accounts Payable	6 Months Ended
Accounts Payable	Apr. 30, 2018
Accounts Payable Current [Abstract]
Accounts Payable	Note 8. Accounts Payable Accounts payable as of April 30, 2018 and October 31, 2017 was $42.8 million and $42.6 million, respectively. Included in the balance were amounts due to POSCO Energy of $32.7 million as of April 30, 2018 and October 31, 2017 for the purchase of inventory.