3. Passur Network (Details) - USD ($)	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Capitalized costs of PASSUR Network	$ 242,000	$ 1,197,000
Passur Network Depreciation	785,000	595,000
Cost of uninstalled PASSUR Systems	1,316,000	1,636,000
Cost of uninstalled SMLAT Systems	576,000	$ 642,000
Passur Network 1
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	850,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	823,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	570,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	409,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 103,000