2. Basis of Presentation and Significant Accounting Policies: PASSUR Network (Policies)	9 Months Ended
Jul. 31, 2021
Policies
PASSUR Network	PASSUR Network Certain of PASSUR’s services have traditionally relied on our proprietary network of sensors for aircraft surveillance - the PASSUR and Surface Multilateration (“SMLAT”) Network Systems (both collectively, the “PASSUR Network”). During the second quarter of fiscal year 2020, in light of the FAA's mandate for ADS-B equipage on aircrafts operating in most U.S. airspace, effective January 2020, and parallel adoption of ADS-B requirements in much of the world, the Company performed a comprehensive review of its data feeds, specifically those associated with the PASSUR Network units, and external ADS-B data feeds to determine if these external data feeds provide sufficient redundant data as to that generated from the existing PASSUR installations. The Company determined that such services could be powered by a combination of FAA data plus commercial ADS-B aggregator feeds and other data feeds available to the Company, which would provide a more cost-effective solution and allow us to focus more on value-added analytics, and less on sensor technology. In this regard, the Company reviewed and decommissioned approximately half of its PASSUR Network system assets during the second quarter of fiscal 2020. As a result, during the year ended October 31, 2020, the Company wrote off the carrying value applicable to the PASSUR Network systems of approximately $3,565,000, and lease assets applicable to these PASSUR locations of approximately $175,000 during the second quarter of fiscal 2020, which amounts were included as an impairment charge for the year ended October 31, 2020. The write-off amount included PASSUR System and SMLAT System assets as well as inventory of finished and spare parts. The Company did not capitalize any costs related to the PASSUR Network for the nine months ended July 31, 2021 and July 31, 2020, respectively. Additionally, the Company did not purchase any parts for the PASSUR Network for the nine months ended July 31, 2021 and July 31, 2020, respectively, and used $0 and $9,300 of PASSUR Network parts for repairs during the nine months ended July 31, 2021 and July 31, 2020, respectively. Depreciation expenses related to the Company-owned PASSUR Network was $0 for both of the three month periods ended July 31, 2021 and July 31, 2020, respectively, and $0 and $374,000 for the nine months ended July 31, 2021 and July 31, 2020, respectively. Depreciation was charged to cost of revenues and is recorded using the straight-line method over the estimated useful life of the asset, which was estimated at five years for SMLAT Systems and seven years for PASSUR Systems. As a result of the decommissioning of the PASSUR Network and the resulting write off of all PASSUR Network assets during fiscal 2020, as described above, the Company will no longer incur any future depreciation expense related to the PASSUR Network. As a result of the FAA mandate described above and the corresponding review conducted by the Company, which resulted in the decommissioning of the PASSUR Network, the Company anticipates that the costs of maintaining and operating these systems will continue to decrease materially throughout the balance of the fiscal year. The net carrying balance of the PASSUR Network assets was $0 as of July 31, 2021 and October 31, 2020, respectively.

2. Basis of Presentation and Significant Accounting Policies: PASSUR Network (Policies)

9 Months Ended

Jul. 31, 2021

PASSUR Network

Certain of PASSUR’s services have traditionally relied on our proprietary network of sensors for aircraft surveillance - the PASSUR and Surface Multilateration (“SMLAT”) Network Systems (both collectively, the “PASSUR Network”). During the second quarter of fiscal year 2020, in light of the FAA's mandate for ADS-B equipage on aircrafts operating in most U.S. airspace, effective January 2020, and parallel adoption of ADS-B requirements in much of the world, the Company performed a comprehensive review of its data feeds, specifically those associated with the PASSUR Network units, and external ADS-B data feeds to determine if these external data feeds provide sufficient redundant data as to that generated from the existing PASSUR installations. The Company determined that such services could be powered by a combination of FAA data plus commercial ADS-B aggregator feeds and other data feeds available to the Company, which would provide a more cost-effective solution and allow us to focus more on value-added analytics, and less on sensor technology. In this regard, the Company reviewed and decommissioned approximately half of its PASSUR Network system assets during the second quarter of fiscal 2020. As a result, during the year ended October 31, 2020, the Company wrote off the carrying value applicable to the PASSUR Network systems of approximately $3,565,000, and lease assets applicable to these PASSUR locations of approximately $175,000 during the second quarter of fiscal 2020, which amounts were included as an impairment charge for the year ended October 31, 2020. The write-off amount included PASSUR System and SMLAT System assets as well as inventory of finished and spare parts.

The Company did not capitalize any costs related to the PASSUR Network for the nine months ended July 31, 2021 and July 31, 2020, respectively. Additionally, the Company did not purchase any parts for the PASSUR Network for the nine months ended July 31, 2021 and July 31, 2020, respectively, and used $0 and $9,300 of PASSUR Network parts for repairs during the nine months ended July 31, 2021 and July 31, 2020, respectively.

Depreciation expenses related to the Company-owned PASSUR Network was $0 for both of the three month periods ended July 31, 2021 and July 31, 2020, respectively, and $0 and $374,000 for the nine months ended July 31, 2021 and July 31, 2020, respectively. Depreciation was charged to cost of revenues and is recorded using the straight-line method over the estimated useful life of the asset, which was estimated at five years for SMLAT Systems and seven years for PASSUR Systems. As a result of the decommissioning of the PASSUR Network and the resulting write off of all PASSUR Network assets during fiscal 2020, as described above, the Company will no longer incur any future depreciation expense related to the PASSUR Network.

As a result of the FAA mandate described above and the corresponding review conducted by the Company, which resulted in the decommissioning of the PASSUR Network, the Company anticipates that the costs of maintaining and operating these systems will continue to decrease materially throughout the balance of the fiscal year.

The net carrying balance of the PASSUR Network assets was $0 as of July 31, 2021 and October 31, 2020, respectively.