2. Basis of Presentation and Significant Accounting Policies: PASSUR Network (Details) - USD ($)			3 Months Ended		9 Months Ended
	Jul. 31, 2020	Oct. 31, 2019	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Impairment Of Long Lived Assets, Held For Use (Rounded)					$ 9,874,000
PASSUR Network Parts Used in Repairs			$ 0	$ 8,000	9,300	$ 30,000
Depreciation of PASSUR Network costs			$ 0	226,000	374,000	642,000
PASSUR Network Costs, Capitalized				$ 61,000		$ 61,000
PASSUR NETWORK, Net (Rounded)	$ 0	$ 3,949,000
Part and Finished Goods for the PASSUR Network		$ 1,831,000
Passur Network 1
Impairment Of Long Lived Assets, Held For Use (Rounded)					$ 3,565,000