Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2019	Oct. 31, 2018
Current assets:
Cash and cash equivalents, unrestricted	$ 14,889	$ 39,291
Restricted cash and cash equivalents - short-term	1,743	5,806
Accounts receivable, net	11,842	9,280
Unbilled receivables	11,078	13,759
Inventories	57,043	53,575
Other current assets	7,668	8,592
Total current assets	104,263	130,303
Restricted cash and cash equivalents - long-term	36,350	35,142
Project assets	123,136	99,600
Property, plant and equipment, net	43,560	48,204
Goodwill	4,075	4,075
Intangible asset	9,592	9,592
Other assets	20,251	13,505
Total assets	341,227	340,421
Current liabilities:
Current portion of long-term debt	54,815	17,596
Accounts payable	27,810	22,594
Accrued liabilities	10,954	7,632
Deferred revenue	16,331	11,347
Preferred stock obligation of subsidiary	930	952
Total current liabilities	110,840	60,121
Long-term deferred revenue	22,470	16,793
Long-term preferred stock obligation of subsidiary	14,942	14,965
Long-term debt and other liabilities	59,575	71,619
Total liabilities	207,827	163,498
Stockholders’ equity:
Common stock ($0.0001 par value); 225,000,000 shares authorized as of April 30, 2019 and October 31, 2018; 13,709,330 and 7,972,686 shares issued and outstanding as of April 30, 2019 and October 31, 2018, respectively	1	1
Additional paid-in capital	1,084,969	1,073,463
Accumulated deficit	(1,034,599)	(990,867)
Accumulated other comprehensive loss	(536)	(403)
Treasury stock, Common, at cost (42,496 and 13,042 shares as of April 30, 2019 and October 31, 2018, respectively)	(466)	(363)
Deferred compensation	466	363
Total stockholders’ equity	49,835	82,194
Total liabilities and stockholders' equity	341,227	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	3,162	7,480
Series D Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock	$ 20,546	$ 27,392