Loss Per Share - Calculation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Numerator
Net loss		$ (17,001)	$ (11,067)	$ (43,924)	$ (38,260)
Net loss attributable to noncontrolling interest		0	57	0	165
Preferred stock dividends		(800)	(800)	(2,400)	(2,400)
Net loss attributable to common shareholders		$ (17,801)	$ (11,810)	$ (46,324)	$ (40,495)
Denominator
Weighted average basic common shares		57,420,050	31,015,658	45,903,033	28,680,596
Effect of dilutive securities	[1]	0	0	0	0
Weighted average diluted common shares		57,420,050	31,015,658	45,903,033	28,680,596
Basic loss per share		$ (0.31)	$ (0.38)	$ (1.01)	$ (1.41)
Diluted loss per share	[1]	$ (0.31)	$ (0.38)	$ (1.01)	$ (1.41)

[1] Due to the net loss to common shareholders in each of the periods presented above, diluted loss per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. As of July 31, 2017 and 2016, potentially dilutive securities excluded from the diluted loss per share calculation are as follows: