Stockholders' Equity - Schedule of Stockholders Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of October 31, 2017			$ 101,256
Foreign currency translation adjustments	$ (128)	$ 199	(41)	$ 161
Net loss	(15,881)	$ (17,001)	(33,238)	$ (43,924)
Balance as of July 31, 2018	95,508		95,508
Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of October 31, 2017			101,256
Share-based compensation			2,309
Proceeds from common stock issuance and warrant exercises, net of fees			10,013
Common stock issued, non-employee compensation			282
Taxes paid for shares surrendered upon vesting of restricted stock awards, net of stock issued under benefit plans			(656)
Preferred dividends – Series B			(2,400)
Conversion of Redeemable Series C preferred stock			17,983
Foreign currency translation adjustments			(41)
Net loss			(33,238)
Balance as of July 31, 2018	$ 95,508		$ 95,508