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EarningsPer Share - Calculation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2018 | Jul. 31, 2018 | Apr. 30, 2018 | Jan. 31, 2018 | Oct. 31, 2017 | Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ (14,096) | $ (15,881) | $ (13,174) | $ (4,183) | $ (9,979) | $ (17,001) | $ (13,238) | $ (13,685) | $ (47,334) | $ (53,903) | $ (51,208)
Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0 | 0 | 251
Series B Preferred stock dividends |  |  |  |  |  | (800) | (800) | (800) | (800) | (3,200) | (3,200) | (3,200)
Series D Preferred stock redemption accretion |  |  |  |  |  |  |  |  |  | (2,075) |  |
Net loss to common stockholders |  | (17,929) | (17,620) | (18,173) | (8,446) | $ (10,779) | $ (17,801) | $ (14,038) | $ (14,485) | $ (62,168) | $ (57,103) | $ (54,157)
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding - basic |  |  |  |  |  |  |  |  |  | 82,754,268 | 49,914,904 | 29,773,700
Effect of dilutive securities | [1] |  |  |  |  |  |  |  |  | 0 | 0 | 0
Weighted average common shares outstanding - diluted |  |  |  |  |  |  |  |  |  | 82,754,268 | 49,914,904 | 29,773,700
Net loss to common stockholders per share - basic |  |  |  |  |  |  |  |  |  | $ (0.75) | $ (1.14) | $ (1.82)
Net loss to common stockholders per share - diluted | [1] |  |  |  |  |  |  |  |  | $ (0.75) | $ (1.14) | $ (1.82)
Series D Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred stock redemption accretion |  | (2,075) |  |  |  |  |  |  |  | $ (2,075) | $ 0 | $ 0
Series C Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred stock deemed dividends |  | (958) | (939) | (4,199) | (3,463) |  |  |  |  | (9,559) | 0 | 0
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Series B Preferred stock dividends |  | $ (800) | $ (800) | $ (800) | $ (800) |  |  |  |  | $ (3,200) | $ (3,200) | $ (3,200)
[1] | Due to the net loss to common stockholders in each of the years presented above, diluted earnings per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive.

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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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