Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Current assets:
Cash and cash equivalents, unrestricted	$ 9,434	$ 39,291
Restricted cash and cash equivalents - short-term	3,473	5,806
Accounts receivable, net of allowance for doubtful accounts of $0 and $160 as of October 31, 2019 and 2018, respectively	3,292	9,280
Unbilled receivables	7,684	13,759
Inventories	54,515	53,575
Other current assets	5,921	8,592
Total current assets	84,319	130,303
Restricted cash and cash equivalents - long-term	26,871	35,142
Inventories - long-term	2,179
Project assets	144,115	99,600
Property, plant and equipment, net	41,134	48,204
Goodwill	4,075	4,075
Intangible assets	21,264	9,592
Other assets	9,489	13,505
Total assets	333,446	340,421
Current liabilities:
Current portion of long-term debt	21,916	17,596
Accounts payable	16,943	22,594
Accrued liabilities	11,452	7,632
Deferred revenue	11,471	11,347
Preferred stock obligation of subsidiary	950	952
Total current liabilities	62,732	60,121
Long-term deferred revenue	28,705	16,793
Long-term preferred stock obligation of subsidiary	16,275	14,965
Long-term debt and other liabilities	90,140	71,619
Total liabilities	197,852	163,498
Stockholders’ equity
Common stock ($0.0001 par value; 225,000,000 shares authorized as of October 31, 2019 and 2018; 193,608,684 and 7,972,686 shares issued and outstanding as of October 31, 2019 and 2018, respectively)	19	1
Additional paid-in capital	1,151,454	1,073,463
Accumulated deficit	(1,075,089)	(990,867)
Accumulated other comprehensive loss	(647)	(403)
Treasury stock, Common, at cost (42,496 and 13,042 shares as of October 31, 2019 and 2018, respectively)	(466)	(363)
Deferred compensation	466	363
Total stockholders’ equity	75,737	82,194
Total liabilities and stockholders’ equity	333,446	340,421
Series B Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock	$ 59,857	59,857
Series C Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock		7,480
Series D Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock		$ 27,392