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 |