3. Passur Network (Details) - USD ($)	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Capitalized costs of PASSUR Network	$ 61,000	$ 242,000
Passur Network Depreciation	868,000	785,000
Purchased Parts for PASSUR Network	3,000	152,000
PASSUR Network Parts Used in Repairs	49,000	73,000
PASSUR NETWORK, Net (Rounded)	3,949,000	4,801,000
Cost of uninstalled PASSUR Systems	1,298,000	1,316,000
Cost of uninstalled SMLAT Systems	533,000	$ 576,000
Passur Network 1
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	854,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	610,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	442,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	136,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 47,000