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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

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