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Note 6 - Convertible Promissory Note (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2023
Jan. 31, 2024
Mar. 31, 2024
Sep. 30, 2023
Mar. 31, 2023
Sep. 30, 2023
Dec. 31, 2023
Jul. 23, 2019
Amortization of Debt Discount (Premium)     $ 1,052,000   $ 3,472,000      
Convertible Debt [Member] | Revolving Credit Facility [Member]                
Share Price   $ 0.45            
The July 2019 Note [Member] | Convertible Debt [Member]                
Debt Instrument, Face Amount             $ 397,000 $ 1,000,000
Debt Instrument, Interest Rate, Stated Percentage             24.00% 24.00%
Debt Instrument, Convertible, Conversion Price $ 2.87 $ 1.07         $ 0.79  
Long-Term Debt, Fair Value $ 1,239,000   7,912,000          
Liabilities, Fair Value Adjustment $ 239,000              
Debt Conversion, Converted Instrument, Amount         $ 603,000      
Debt Conversion, Converted Instrument, Shares Issued         215,000      
Repayments of Debt   $ 398,000            
Debt Instrument, Unamortized Discount         $ 37,000      
Amortization of Debt Discount (Premium)     15,000   174,000      
Interest Expense, Debt     8,000   $ 42,000      
Accrued Interest Payable     $ 102,000          
Antidilutive Triggering Event [Member] | Convertible Debt [Member]                
Amortization of Debt Discount (Premium)       $ 72,000   $ 41,000