Loss Per Share - Schedule of Potentially Dilutive Securities Excluded from the Diluted Loss Per Share Calculation (Parenthetical) (Details) - Series C Preferred Stock [Member] $ / shares in Units, $ in Millions	6 Months Ended
	Apr. 30, 2018 USD ($) $ / shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Preferred stock, stated value	$ 14.5
Preferred stock, original total stated value	33.5
Preferred stock, conversion amount	$ 19.0
Conversion of stock conversion price | $ / shares	$ 1.84