Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2016	Oct. 31, 2015
Statement of Financial Position [Abstract]
Preferred Stock, Liquidation Preference, Value	$ 64,020	$ 64,020
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	75,000,000	39,583,333
Common stock, shares issued	30,804,069	25,964,710
Common stock, shares outstanding	30,804,069	25,964,710
Treasury stock, shares	21,527	5,845