Annual report pursuant to Section 13 and 15(d)

Note 6 - Debt - Assumptions for Note Valuation Using Binomial Lattice Model (Details)

v3.23.1
Note 6 - Debt - Assumptions for Note Valuation Using Binomial Lattice Model (Details)
3 Months Ended 12 Months Ended
Dec. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
May 16, 2022
USD ($)
Change in fair value   $ 334,000 $ (49,000)    
Securities Purchase Agreement [Member] | Note Holders [Member]          
Estimated Fair value of Notes, including OID, excluding accrued interest   $ 4,245,000 $ 3,986,000   $ 4,000,000
Change in fair value $ 285,000     $ 0  
Securities Purchase Agreement [Member] | Note Holders [Member] | Measurement Input, Share Price [Member]          
Debt instrument, measurement input   0.68 1.02   1.27
Securities Purchase Agreement [Member] | Note Holders [Member] | Measurement Input, Price Volatility [Member]          
Debt instrument, measurement input   0.82 0.83   0.82
Securities Purchase Agreement [Member] | Note Holders [Member] | Measurement Input, Risk Free Interest Rate [Member]          
Debt instrument, measurement input   0.031 0.027   0.021
Securities Purchase Agreement [Member] | Note Holders [Member] | Measurement Input, Expected Dividend Rate [Member]          
Debt instrument, measurement input   0 0   0
Securities Purchase Agreement [Member] | Note Holders [Member] | Measurement Input, Implied Rate [Member]          
Debt instrument, measurement input   0.234 0.239   0.207