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Note 12 - Subsequent Events (Details Textual) - USD ($)
Nov. 02, 2022
Nov. 01, 2022
Oct. 21, 2022
Oct. 18, 2022
Sep. 30, 2022
Dec. 31, 2021
Common Stock, Par or Stated Value Per Share (in dollars per share)         $ 0.005 $ 0.005
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 0.82 $ 4.48
Subsequent Event [Member]            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   20,400,000        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 0.15        
Warrants and Rights Outstanding, Term (Year)   5 years        
Aggregate Purchase Price of PIPE Shares and Warrants   $ 800,000        
Subsequent Event [Member] | Each Warrant [Member]            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 0.075        
Private Placement [Member] | Subsequent Event [Member]            
Stock Issued During Period, Shares, New Issues (in shares)   10,200,000        
Common Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.005        
Forecast [Member] | Conversion of the A&R Note [Member]            
Debt Conversion, Converted Instrument, Shares Issued (in shares) 1,366,237   2,551,000      
Debt Conversion, Original Debt, Amount     $ 400,000      
Forecast [Member] | Assignment of Promissory Note with Avenue Venture Opportunities Fund, L.P. [Member]            
Debt Instrument, Face Amount       $ 15,000,000    
Forecast [Member] | Assignment of Promissory Note with Avenue Venture Opportunities Fund, L.P. [Member] | Silverback Capital Corporation [Member] | Avenue Venture [Member]            
Payments to Acquire Notes Receivable       400,000    
Forecast [Member] | Assignment of Promissory Note with Avenue Venture Opportunities Fund, L.P. [Member] | Avenue Venture [Member] | Silverback Capital Corporation [Member]            
Debt Instrument, Face Amount       400,000    
Forecast [Member] | A&R Note [Member]            
Debt Instrument, Face Amount       $ 400,000    
Debt Instrument, Debt Repayment, Percent       7.74%    
Forecast [Member] | A&R Note [Member] | Prime Rate [Member]            
Debt Instrument, Basis Spread on Variable Rate       3.25%