Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Fair Value, Liabilities Measured on Recurring Basis (Details) (Parenthetical)

v3.7.0.1
Fair Value - Fair Value, Liabilities Measured on Recurring Basis (Details) (Parenthetical) - $ / shares
3 Months Ended
Jan. 31, 2017
Oct. 31, 2016
Exercise price per share $ 5.04 $ 5.04
Warrants exercisable period February 2017 through August 2017 November 2016 through August 2017
Minimum [Member]    
Exercise price per share $ 10.63 $ 10.63
Maximum [Member]    
Exercise price per share $ 18.75 $ 18.75