Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Apr. 30, 2021	Oct. 31, 2020
Current assets:
Cash and cash equivalents, unrestricted		$ 139,086	$ 149,867
Restricted cash and cash equivalents - short-term	[1]	17,427	9,233
Accounts receivable, net		12,147	9,563
Unbilled receivables		7,660	8,041
Inventories		58,920	50,971
Other current assets		10,317	6,306
Total current assets		245,557	233,981
Restricted cash and cash equivalents - long-term		14,669	32,952
Inventories - long-term	[2]	4,586	8,986
Project assets		187,242	161,809
Property, plant and equipment, net		35,417	36,331
Operating lease right-of-use assets, net		8,201	10,098
Goodwill		4,075	4,075
Intangible assets, net		19,318	19,967
Other assets		16,526	15,339
Total assets		535,591	523,538
Current liabilities:
Current portion of long-term debt		8,575	21,366
Current portion of operating lease liabilities		875	939
Accounts payable		15,884	9,576
Accrued liabilities		13,419	15,681
Deferred revenue		17,464	10,399
Preferred stock obligation of subsidiary			938
Total current liabilities		56,217	58,899
Long-term deferred revenue		26,698	31,501
Long-term preferred stock obligation of subsidiary			18,265
Long-term operating lease liabilities		8,190	9,817
Long-term debt and other liabilities		75,580	150,651
Total liabilities		166,685	269,133
Stockholders' equity:
Common stock ($0.0001 par value); 500,000,000 and 337,500,000 shares authorized as of April 30, 2021 and October 31, 2020, respectively; 322,492,804 and 294,706,758 shares issued and outstanding as of April 30, 2021 and October 31, 2020, respectively		32	29
Additional paid-in capital		1,538,831	1,359,454
Accumulated deficit		(1,229,073)	(1,164,196)
Accumulated other comprehensive loss		(741)	(739)
Treasury stock, Common, at cost (61,836 and 56,411 shares as of April 30, 2021		(503)	(432)
Deferred compensation		503	432
Total stockholders' equity		309,049	194,548
Total liabilities and stockholders' equity		535,591	523,538
Series B Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock		$ 59,857	$ 59,857

[1] Short-term restricted cash and cash equivalents are amounts expected to be released and categorized as unrestricted cash within twelve months of the balance sheet date.

[2] Long-term inventory includes modules that are contractually required to be segregated for use as exchange modules for specific project assets.