Provision (benefit) for income taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Current:
Federal	$ 400	$ (332)
State	24	(13)
Current income tax expense (benefit)	424	(345)
Deferred:
Federal	(293)	(179)
State	3	(128)
Deferred income tax expense (benefit)	(290)	(307)
Provision for income taxes	$ 134	$ (652)