Provision (benefit) for income taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Current:
Federal	$ 467	$ 839
State	17	180
Current income tax expense (benefit)	484	1,019
Deferred:
Federal	(131)	(54)
State	(38)	(6)
Deferred income tax expense (benefit)	(166)	(60)
Provision for income taxes	$ 315	$ 959