Warranty Obligations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]
Accrued warranty at beginning of period	$ 446
Provision for warranty expense	13
Change in accrual for preexisting warranties	11
Warranty costs paid	(56)
Accrued warranty at end of period	414
Total accrued warranty	$ 446	$ 414
Less: Current portion of accrued warranty		243
Long-term portion of accrued warranty		$ 171