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Note 8 - Segment Reporting - Net Sales, Income Before Provision for Income Taxes and Other Related Segment Information (Details) - USD ($)
 3 Months Ended
Jan. 31, 2026
Jan. 31, 2025
Oct. 31, 2025
Net sales $ 18,969,000 $ 19,200,000  
Material cost 8,318,000 9,275,000  
Salaries and benefits 3,365,000 3,242,000  
Depreciation 128,000 132,000  
Other costs of sales 1,038,000 834,000  
Total cost of goods sold 12,849,000 13,483,000  
Gross profit 6,120,000 5,717,000  
Salaries and benefits 2,248,000 2,190,000  
Engineering expense 852,000 682,000  
Share-Based Payment Arrangement, Expense 264,000 195,000  
Commission and bonus 346,000 465,000  
Depreciation 79,000 72,000  
Amortization 411,000 411,000  
Corporate and public company fees 535,000 434,000  
Selling and general 1,208,000 1,212,000  
Total operating expenses 5,943,000 5,661,000  
Operating income 177,000 56,000  
Other expense (193,000) (265,000)  
Loss before provision for income taxes (16,000) (209,000)  
Provision for income taxes 34,000 36,000  
Consolidated net loss (50,000) (245,000)  
Total assets 70,335,000 70,429,000 $ 73,046,000
Expenditures for Segment Assets $ 218,000 $ 27,000