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Note 8 - Income Tax Provision (Benefit) (Details Textual) - USD ($)
 12 Months Ended
Oct. 31, 2023
Oct. 31, 2022
Oct. 31, 2021
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 100,000 $ 0  
Income Tax Expense (Benefit), Total $ 1,172,000 $ (139,000)  
Effective Income Tax Rate Reconciliation, Percent, Total 27.50% 9.20%  
Benefit from income taxes $ (1,172,000) $ 139,000  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total $ 178,000 $ 121,000 $ 128,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 40,000    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense 20,000 $ 13,000  
General Business Tax Credit Carryforward [Member]      
Tax Credit Carryforward, Amount 600,000    
Domestic Tax Authority [Member]      
Operating Loss Carryforwards 300,000    
State and Local Jurisdiction [Member]      
Operating Loss Carryforwards 200,000    
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]      
Tax Credit Carryforward, Amount $ 200,000