2. Basis of Presentation and Significant Accounting Policies: PASSUR Network (Details) - USD ($)			3 Months Ended		6 Months Ended
	Apr. 30, 2020	Oct. 31, 2019	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Impairment Of Long Lived Assets, Held For Use, Rounded					$ 9,874,000
PASSUR Network Parts Used in Repairs			$ 0	$ 13,000	9,300	$ 22,000
Depreciation of PASSUR Network costs			$ 148,000	$ 210,000	374,000	416,000
PASSUR Network Costs, Capitalized						$ 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