Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2017	Oct. 31, 2016
Other Commitments [Line Items]
Net claim payments	$ 56
Spacer Migration
Other Commitments [Line Items]
Spacer specific product warranty accrual		$ 800
Net claim payments	400
Product Warranty Accrual, Period Increase (Decrease)	$ 400