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Note 9 - Senior Secured Line of Credit (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jan. 28, 2025
Jul. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Nov. 01, 2024
Sep. 08, 2023
Jul. 31, 2023
Jun. 02, 2021
Proceeds from (Repayments of) Notes Payable         $ (510,000) $ (227,000)        
Revolving Credit Facility [Member]                    
Line of Credit Facility, Maximum Borrowing Capacity                   $ 7,000,000
Debt Instrument, Interest Rate, Stated Percentage   2.50%                
Line of Credit Facility, Interest Rate at Period End     10.00%   10.00%          
Long-Term Line of Credit     $ 4,300,000   $ 4,300,000          
Interest Expense, Operating and Nonoperating     $ 400,000 $ 300,000 $ 900,000 $ 900,000        
Debt Instrument, Covenant, Deposits Held               $ 5,000,000 $ 8,000,000  
Revolving Credit Facility [Member] | Subsequent Event [Member]                    
Debt Instrument, Basis Spread on Variable Rate 2.50%                  
Line of Credit Facility, Interest Rate at Period End 10.00%                  
Debt Instrument, Covenant, Deposits Held $ 5,000,000                  
Revolving Credit Facility [Member] | Subsequent Event [Member] | Minimum [Member]                    
Line of Credit Facility, Interest Rate at Period End 7.50%                  
Revolving Credit Facility [Member] | Prime Rate [Member]                    
Debt Instrument, Basis Spread on Variable Rate   2.50%                
Revolving Credit Facility [Member] | Wall Street Journal Money Rate [Member] | Subsequent Event [Member]                    
Debt Instrument, Basis Spread on Variable Rate 2.50%                  
Promissory Note [Member]                    
Debt Instrument, Face Amount             $ 6,000,000     $ 7,000
Promissory Note [Member] | Subsequent Event [Member]                    
Long-Term Debt, Gross $ 3,750,000                  
Proceeds from (Repayments of) Notes Payable (3,250,000)                  
Debt Instrument, Periodic Payment 400,000                  
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid $ 151,291.67