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Note 10 - Notes Payable (Details Textual) - USD ($)
1 Months Ended 9 Months Ended
May 05, 2020
Feb. 28, 2021
Jan. 31, 2021
Oct. 31, 2021
Oct. 31, 2020
Proceeds from Unsecured Notes Payable       $ 0 $ 1,607,000
Paycheck Protection Program CARES Act [Member]          
Proceeds from Unsecured Notes Payable $ 1,600,000        
Debt Instrument, Decrease, Forgiveness   $ 850,000 $ 757,000    
Notes Payable to Bank, Total       $ 0