Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Apr. 30, 2016	Oct. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 1,739	$ 1,838
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	800,000	800,000
Common stock, shares issued	399,383	413,923
Common stock, shares outstanding	399,383	413,923