Consolidated Balance Sheets (Unaudited) - USD ($)	Jul. 31, 2019	Oct. 31, 2018
Current assets:
Cash and cash equivalents, unrestricted	$ 16,018,000	$ 39,291,000
Restricted cash and cash equivalents - short-term	1,381,000	5,806,000
Accounts receivable, net	3,705,000	9,280,000
Unbilled receivables	8,186,000	13,759,000
Inventories	59,830,000	53,575,000
Other current assets	7,254,000	8,592,000
Total current assets	96,374,000	130,303,000
Restricted cash and cash equivalents - long-term	28,400,000	35,142,000
Inventories - long-term	2,179,000
Project assets	156,393,000	99,600,000
Property, plant and equipment, net	42,406,000	48,204,000
Goodwill	4,075,000	4,075,000
Intangible assets	21,588,000	9,592,000
Other assets	10,019,000	13,505,000
Total assets	361,434,000	340,421,000
Current liabilities:
Current portion of long-term debt	43,416,000	17,596,000
Accounts payable	30,250,000	22,594,000
Accrued liabilities	8,582,000	7,632,000
Deferred revenue	15,650,000	11,347,000
Preferred stock obligation of subsidiary	950,000	952,000
Total current liabilities	98,848,000	60,121,000
Long-term deferred revenue	22,190,000	16,793,000
Long-term preferred stock obligation of subsidiary	15,933,000	14,965,000
Long-term debt and other liabilities	79,696,000	71,619,000
Total liabilities	216,667,000	163,498,000
Stockholders’ equity:
Common stock ($0.0001 par value); 225,000,000 shares authorized as of July 31, 2019 and October 31, 2018; 118,387,637 and 7,972,686 shares issued and outstanding as of July 31, 2019 and October 31, 2018, respectively	12,000	1,000
Additional paid-in capital	1,125,212,000	1,073,463,000
Accumulated deficit	(1,039,910,000)	(990,867,000)
Accumulated other comprehensive loss	(431,000)	(403,000)
Treasury stock, Common, at cost (42,496 and 13,042 shares as of July 31, 2019 and October 31, 2018, respectively)	(466,000)	(363,000)
Deferred compensation	466,000	363,000
Total stockholders’ equity	84,883,000	82,194,000
Total liabilities and stockholders' equity	361,434,000	340,421,000
Series B Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock	59,857,000	59,857,000
Series C Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock		7,480,000
Series D Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock	$ 27,000	$ 27,392,000