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Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2017
Revenues:        
Product $ 12,200 $ 737 $ 41,730 $ 2,544
Service and license 3,206 12,592 7,310 19,528
Generation 1,742 1,634 3,634 3,719
Advanced Technologies 3,682 5,454 6,769 11,628
Total revenues 20,830 20,417 59,443 37,419
Costs of revenues:        
Product 13,947 3,204 40,084 7,259
Service and license 2,531 12,159 5,937 18,425
Generation 2,036 1,294 3,645 2,409
Advanced technologies 2,945 3,377 5,771 7,130
Total costs of revenues 21,459 20,034 55,437 35,223
Gross (loss) profit (629) 383 4,006 2,196
Operating expenses:        
Administrative and selling expenses 7,085 6,483 13,227 12,487
Research and development expenses 5,021 5,386 9,067 10,778
Restructuring expense   10   1,355
Total costs and expenses 12,106 11,879 22,294 24,620
Loss from operations (12,735) (11,496) (18,288) (22,424)
Interest expense (2,059) (2,310) (4,200) (4,577)
Other income, net 1,620 532 2,096 123
Loss before benefit (provision) for income taxes (13,174) (13,274) (20,392) (26,878)
Benefit (provision) for income taxes   36 3,035 (45)
Net loss (13,174) (13,238) (17,357) (26,923)
Net loss attributable to common stockholders $ (18,173) $ (14,038) $ (26,619) $ (28,523)
Loss per share basic and diluted:        
Net loss per share attributable to common stockholders $ (0.23) $ (0.33) $ (0.35) $ (0.71)
Basic and diluted weighted average shares outstanding 79,563,265 42,568,818 75,731,565 40,049,948
Series C Preferred Stock [Member]        
Operating expenses:        
Series C preferred stock deemed dividends $ (4,199) $ 0 $ (7,662) $ 0
Series B Preferred Stock [Member]        
Operating expenses:        
Series B preferred stock dividends $ (800) $ (800) $ (1,600) $ (1,600)