Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jan. 31, 2019	Oct. 31, 2018
Current assets:
Cash and cash equivalents, unrestricted	$ 27,750	$ 39,291
Restricted cash and cash equivalents - short-term	5,601	5,806
Accounts receivable, net	8,321	9,280
Unbilled receivables	12,387	13,759
Inventories	54,802	53,575
Other current assets	8,273	8,592
Total current assets	117,134	130,303
Restricted cash and cash equivalents - long-term	34,863	35,142
Project assets	109,819	99,600
Property, plant and equipment, net	47,405	48,204
Goodwill	4,075	4,075
Intangible asset	9,592	9,592
Other assets	23,067	13,505
Total assets	345,955	340,421
Current liabilities:
Current portion of long-term debt	38,869	17,596
Accounts payable	19,905	22,594
Accrued liabilities	11,051	7,632
Deferred revenue	17,213	11,347
Preferred stock obligation of subsidiary	951	952
Total current liabilities	87,989	60,121
Long-term deferred revenue	22,769	16,793
Long-term preferred stock obligation of subsidiary	15,282	14,965
Long-term debt and other liabilities	66,883	71,619
Total liabilities	192,923	163,498
Stockholders’ equity:
Common stock ($0.0001 par value); 225,000,000 shares authorized as of January 31, 2019 and October 31, 2018; 108,415,259 and 95,672,237 shares issued and outstanding as of January 31, 2019 and October 31, 2018, respectively	11	10
Additional paid-in capital	1,074,308	1,073,454
Accumulated deficit	(1,015,069)	(990,867)
Accumulated other comprehensive loss	(396)	(403)
Treasury stock, Common, at cost (156,501 shares as of January 31, 2019 and October 31, 2018)	(363)	(363)
Deferred compensation	363	363
Total stockholders’ equity	58,854	82,194
Total liabilities and stockholders' equity	345,955	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	7,470	7,480
Series D Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock	$ 26,851	$ 27,392