Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Oct. 31, 2022
Cash flows from operating activities:
Net loss	$ (21,086)	$ (46,120)	$ (46,120)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	2,637	1,470
Depreciation and amortization	5,405	5,771
Non-cash interest expense on finance obligations	1,052	1,066
Non-cash interest income on investments	(675)
Operating lease costs	323	395
Operating lease payments	(301)	(372)
Impairment of property, plant and equipment and project assets		976
Unrealized foreign currency losses (gains)	5	(82)
Other, net	96	(316)
Decrease (increase) in operating assets:
Accounts receivable	1,672	(15,972)
Unbilled receivables	(4,965)	(4,369)
Inventories	(10,267)	(2,529)
Other assets	(1,006)	(1,994)
(Decrease) increase in operating liabilities:
Accounts payable	(1,072)	2,560
Accrued liabilities	(7,125)	10,027
Deferred revenue	(18,070)	1,735
Net cash used in operating activities	(53,377)	(47,754)
Cash flows from investing activities:
Capital expenditures	(7,765)	(5,331)
Project asset expenditures	(2,080)	(10,435)
Purchases of held-to-maturity debt securities	(74,977)
Net cash used in investing activities	(84,822)	(15,766)
Cash flows from financing activities:
Repayment of debt	(2,291)	(2,530)
Expenses related to common stock issued for stock plans	21	26
Contributions received from sale of noncontrolling interest		12,419
Distribution to noncontrolling interest	(106)
Payments for taxes related to net share settlement of equity awards	(337)	(285)
Payment of preferred dividends	(800)	(800)
Net cash (used in) provided by financing activities	(3,513)	8,830
Effects on cash from changes in foreign currency rates	447	(91)
Net decrease in cash, cash equivalents and restricted cash	(141,265)	(54,781)
Cash, cash equivalents and restricted cash-beginning of period	481,044	460,212	460,212
Cash, cash equivalents and restricted cash-end of period	339,779	405,431	$ 481,044
Supplemental cash flow disclosures:
Cash interest paid	343	329
Noncash financing and investing activity:
Operating lease liabilities	2,005
Operating lease right-of-use assets	2,005
Noncash reclassifications from inventory to project assets		4,217
Accrued purchase of fixed assets, cash to be paid in subsequent period	3,055	1,077
Accrued purchase of project assets, cash to be paid in subsequent period	$ 5,250	$ 7,640