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.