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Consolidated Statements of Operations (Unaudited) - USD ($)
 3 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Revenues:    
Revenues $ 17,783,000 $ 38,613,000
Costs of revenues:    
Costs of revenues 19,988,000 33,978,000
Gross (loss) profit (2,205,000) 4,635,000
Operating expenses:    
Administrative and selling expenses 6,759,000 6,142,000
Research and development expenses 6,280,000 4,046,000
Total costs and expenses 13,039,000 10,188,000
Loss from operations (15,244,000) (5,553,000)
Interest expense (2,464,000) (2,141,000)
Other income, net 160,000 476,000
Loss before benefit for income taxes (17,548,000) (7,218,000)
Benefit for income taxes 0 3,035,000
Net loss (17,548,000) (4,183,000)
Net loss attributable to common stockholders $ (33,038,000) $ (8,446,000)
Loss per share basic and diluted:    
Net loss per share attributable to common stockholders $ (0.33) $ (0.12)
Basic and diluted weighted average shares outstanding 99,860,421 72,024,811
Series B Preferred Stock [Member]    
Operating expenses:    
Preferred stock dividends $ (800,000) $ (800,000)
Series C Preferred Stock [Member]    
Operating expenses:    
Preferred stock deemed dividends and redemption value adjustment (9,005,000) (3,463,000)
Series D Preferred Stock [Member]    
Operating expenses:    
Preferred stock deemed dividends and redemption accretion (5,685,000) 0
Product [Member]    
Revenues:    
Revenues   29,530,000
Costs of revenues:    
Costs of revenues 3,422,000 26,137,000
Service and License [Member]    
Revenues:    
Revenues 11,772,000 4,104,000
Costs of revenues:    
Costs of revenues 12,319,000 3,406,000
Generation [Member]    
Revenues:    
Revenues 1,479,000 1,892,000
Costs of revenues:    
Costs of revenues 1,636,000 1,609,000
Advanced Technologies [Member]    
Revenues:    
Revenues 4,532,000 3,087,000
Costs of revenues:    
Costs of revenues $ 2,611,000 $ 2,826,000