Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2018	Oct. 31, 2017
Current assets:
Cash and cash equivalents, unrestricted	$ 48,663	$ 49,294
Restricted cash and cash equivalents - short-term	5,303	4,628
Accounts receivable, net	39,430	68,521
Inventories	60,114	74,496
Other current assets	9,041	6,571
Total current assets	162,551	203,510
Restricted cash and cash equivalents - long-term	33,289	33,526
Project assets	89,694	73,001
Property, plant and equipment, net	46,176	43,565
Goodwill	4,075	4,075
Intangible asset	9,592	9,592
Other assets	12,819	16,517
Total assets	358,196	383,786
Current liabilities:
Current portion of long-term debt	14,494	28,281
Accounts payable	44,133	42,616
Accrued liabilities	14,454	18,381
Deferred revenue	9,703	7,964
Preferred stock obligation of subsidiary	825	836
Total current liabilities	83,609	98,078
Long-term deferred revenue	17,317	18,915
Long-term preferred stock obligation of subsidiary	14,909	14,221
Long-term debt and other liabilities	77,279	63,759
Total liabilities	193,114	194,973
Stockholders’ equity:
Common stock ($0.0001 par value); 225,000,000 and 125,000,000 shares authorized as of July 31, 2018 and October 31, 2017, respectively; 92,280,169 and 69,492,816 shares issued and outstanding as of July 31, 2018 and October 31, 2017, respectively	9	7
Additional paid-in capital	1,072,726	1,045,197
Accumulated deficit	(976,771)	(943,533)
Accumulated other comprehensive loss	(456)	(415)
Treasury stock, Common, at cost (182,962 and 88,861 shares as of July 31, 2018 and October 31, 2017, respectively)	(447)	(280)
Deferred compensation	447	280
Total stockholders’ equity	95,508	101,256
Total liabilities and stockholders' equity	358,196	383,786
Series B Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock	59,857	59,857
Series C Preferred Stock [Member]
Current liabilities:
Redeemable preferred stock	$ 9,717	$ 27,700