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Note 13 - Convertible Notes (Details Textual) - Senior Unsecured Convertible Notes [Member]
$ / shares in Units, $ in Millions
1 Months Ended
Aug. 12, 2022
USD ($)
$ / shares
Aug. 08, 2022
USD ($)
$ / shares
Jul. 29, 2022
USD ($)
$ / shares
Jun. 30, 2022
USD ($)
shares
May 20, 2022
USD ($)
$ / shares
Proceeds from Convertible Debt         $ 10
Debt Instrument, Interest Rate, Stated Percentage         8.00%
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares         $ 3.33
Conversion Share to Common Stock, Ratio         1
Four Affiliated Individuals [Member]          
Convertible Debt, Total       $ 9  
Affiliated Individual [Member]          
Convertible Debt, Total       $ 1  
Four Board Members [Member]          
Proceeds from Related Party Debt         $ 9
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares       1,965,841  
Non-affiliated Party [Member]          
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares       231,697  
Non-affiliated Party [Member] | Conversion Price 6 Point 254, Maturity Date December 2026 [Member]          
Proceeds from Related Party Debt $ 10        
Debt Instrument, Interest Rate, Stated Percentage 8.00%        
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares $ 6.15        
Director [Member] | Conversion Price 6 Point 254, Maturity Date December 2028 [Member]          
Proceeds from Related Party Debt     $ 5    
Debt Instrument, Interest Rate, Stated Percentage     8.00%    
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares     $ 6.254    
Director [Member] | Conversion Price 6 Point 15, Maturity Date December 2028 [Member]          
Proceeds from Related Party Debt   $ 4      
Debt Instrument, Interest Rate, Stated Percentage   8.00%      
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares   $ 6.254