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Quarterly Information (Unaudited) - Schedule of Quarterly Financial Information (Details) - USD ($)
 3 Months Ended 12 Months Ended
Aug. 15, 2019
May 15, 2019
Oct. 31, 2020
Jul. 31, 2020
Apr. 30, 2020
Jan. 31, 2020
Oct. 31, 2019
Jul. 31, 2019
Apr. 30, 2019
Jan. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Quarterly Financial Information [Line Items]                          
Revenues     $ 16,999,000 $ 18,728,000 $ 18,880,000 $ 16,264,000 $ 11,041,000 $ 22,712,000 $ 9,216,000 $ 17,783,000 $ 70,871,000 $ 60,752,000 $ 89,437,000
Gross profit (loss)     (8,045,000) (3,128,000) 167,000 3,281,000 (23,389,000) 7,965,000 (3,640,000) (2,205,000) (7,725,000) (21,269,000)  
Loss from operations     (17,122,000) (10,762,000) (8,142,000) (3,140,000) (32,992,000) (1,070,000) (17,623,000) (15,244,000) (39,166,000) (66,929,000) (44,632,000)
Net loss     (18,856,000) (15,331,000) (14,769,000) (40,151,000) (35,179,000) (5,311,000) (19,530,000) (17,548,000) (89,107,000) (77,568,000) (47,334,000)
Series B Preferred stock dividends                         (3,200,000)
Net loss to common stockholders     $ (19,656,000) $ (16,131,000) $ (15,569,000) $ (41,082,000) $ (36,003,000) $ (8,328,000) $ (22,876,000) $ (33,038,000) $ (92,438,000) $ (100,245,000) (62,168,000)
Net loss to common stockholders per basic and diluted common share [1]     $ (0.08) $ (0.07) $ (0.07) $ (0.20) $ (0.23) $ (0.18) $ (2.06) $ (3.97) $ (0.42) $ (1.82)  
Change in fair value of common stock warrant liability                     $ (37,086,000) $ 0 0
Series B Preferred Stock [Member]                          
Quarterly Financial Information [Line Items]                          
Series B Preferred stock dividends $ 0 $ 0 $ (800,000) $ (800,000) $ (800,000) $ (931,000) $ (821,000) $ (810,000) $ (800,000) $ (800,000) (3,331,000) (3,231,000) (3,200,000)
Series A Warrant [Member]                          
Quarterly Financial Information [Line Items]                          
Change in fair value of common stock warrant liability                 (3,169,000)   $ 0 (3,169,000) $ 0
Series C Preferred Stock [Member]                          
Quarterly Financial Information [Line Items]                          
Series C preferred stock deemed (dividends) contributions and redemption value adjustment               884,000 1,599,000 (9,005,000)   (6,522,000)  
Series D Preferred Stock [Member]                          
Quarterly Financial Information [Line Items]                          
Series D preferred stock deemed dividends and redemption accretion             $ (3,000) $ (3,091,000) $ (976,000) $ (5,685,000)   $ (9,755,000)  
[1] The full year net loss to common stockholders per basic and diluted common share may not equal the sum of the quarters due to weighting of outstanding shares