Shareholders' Equity - Schedule of Stockholders Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends	$ (800)	$ (800)	$ (2,400)	$ (2,400)
Foreign currency translation adjustments	199	(228)	161	(26)
Net loss	(17,001)	$ (11,067)	(43,924)	$ (38,260)
Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' equity, Including Portion Attributable to Noncontrolling Interest			114,396
Share-based compensation			3,432
Warrant exercises			1,782
Stock issued under benefit plans net of taxes paid upon vesting of restricted stock awards			51
Preferred stock dividends			(2,400)
Foreign currency translation adjustments			161
Net loss			(43,924)
Stockholders' equity, Including Portion Attributable to Noncontrolling Interest	$ 99,813		99,813
Common Stock and Pre-Funded Warrants [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of common stock and warrants, net			12,427
Public Offering [Member] | Common Stock and Warrants [Member] | Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of common stock and warrants, net			$ 13,888