XML 61 R43.htm IDEA: XBRL DOCUMENT v3.20.4
Note 6 - Product Warranties (Details Textual) - USD ($)
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Standard and Extended Product Warranty Accrual, Ending Balance $ 85,000 $ 120,000 $ 180,000
Product Warranty Expense 67,150 158,426 $ 219,190
Accounts Payable and Accrued Liabilities [Member]      
Standard and Extended Product Warranty Accrual, Ending Balance $ 85,000 $ 120,000