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Derivatives (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Mar. 31, 2023
Dec. 31, 2022
May 31, 2013
Convertible 8.00% Notes              
Derivative [Line Items]              
Derivative gain (loss)     $ 200,000        
Loan interest rate             8.00%
2023 13% Notes              
Derivative [Line Items]              
Loan interest rate 13.00%   13.00%   13.00%    
2023 Funding Agreement              
Derivative [Line Items]              
Derivative gain (loss) $ (100,000)   $ 200,000        
Derivative liability $ 100,000   $ 100,000        
2019 Facility Agreement              
Derivative [Line Items]              
Derivative gain (loss)   $ 700,000   $ (1,300,000)      
Derivative liability         $ 0 $ 100,000