Note 3 - Concentrations of Credit Risk	12 Months Ended
Oct. 31, 2021
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	Note 3 – Concentrations of credit risk Financial instruments which potentially subject us to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. We maintain our cash and cash equivalents with high-credit quality financial institutions. At October 31, 2021, we had cash and cash equivalent balances in excess of federally insured limits in the amount of approximately $12.3 million. Two customers, a wireless carrier, and a distributor, accounted for approximately 21% and 11%, respectively, of net sales for the year ended October 31, 2021. These same two customers had accounts receivable balances that accounted for 28% and 8%, respectively, of the total net accounts receivable balance at October 31, 2021. For the year ended October 31, 2020, the same distributor accounted for approximately 14% of net sales, and another distributor accounted for 12% of net sales whilst the wireless carrier was not a customer yet. These two distributors' accounts receivable balances each accounted for approximately 12% of the total net accounts receivable balance at October 31, 2020. Although the distributors have been on-going major customers of the Company and the wireless carrier is a new customer to the Company, the written agreements with these customers do not have any minimum purchase obligations and they could stop buying our products at any time and for any reason. A reduction, delay, or cancellation of orders from these customers or the loss of these customers could significantly reduce our future revenues and profits.

Note 3 - Concentrations of Credit Risk

12 Months Ended

Oct. 31, 2021

Concentration Risk Disclosure [Text Block]

Note 3 – Concentrations of credit risk

Financial instruments which potentially subject us to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. We maintain our cash and cash equivalents with high-credit quality financial institutions. At October 31, 2021, we had cash and cash equivalent balances in excess of federally insured limits in the amount of approximately $12.3 million.

Two customers, a wireless carrier, and a distributor, accounted for approximately 21% and 11%, respectively, of net sales for the year ended October 31, 2021. These same two customers had accounts receivable balances that accounted for 28% and 8%, respectively, of the total net accounts receivable balance at October 31, 2021. For the year ended October 31, 2020, the same distributor accounted for approximately 14% of net sales, and another distributor accounted for 12% of net sales whilst the wireless carrier was not a customer yet. These two distributors' accounts receivable balances each accounted for approximately 12% of the total net accounts receivable balance at October 31, 2020. Although the distributors have been on-going major customers of the Company and the wireless carrier is a new customer to the Company, the written agreements with these customers do not have any minimum purchase obligations and they could stop buying our products at any time and for any reason. A reduction, delay, or cancellation of orders from these customers or the loss of these customers could significantly reduce our future revenues and profits.