Legal Proceedings and Other Matters Commitments and Contingencies (Details)	1 Months Ended		2 Months Ended	12 Months Ended
	Aug. 31, 2015 patent	Oct. 31, 2014 USD ($) modem	Jul. 31, 2016 USD ($)	Dec. 31, 2012 patent	Jul. 31, 2012 patent	Oct. 31, 2016 USD ($)
Pre-Acquisition Contingencies Related to TCS Intellectual Property
Loss Contingencies [Line Items]
Remaining preliminary estimated fair value						$ 26,992,000
CallWave Communications LLC
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent				1
CallWave Communications LLC | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent					1
IP Cube Partners CO. Ltd.
Loss Contingencies [Line Items]
Number of patents involved in case | patent	2
Other Proceedings
Loss Contingencies [Line Items]
Compensatory damages sought			$ 20,000,000
Punitive damages sought			$ 25,000,000
Sales Value Of Equipment		$ 288,000
Number of modems repaired | modem		3