Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Sales of Shares Under Common Stock Purchase Agreement (Details Textual)

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Note 9 - Sales of Shares Under Common Stock Purchase Agreement (Details Textual) - USD ($)
 3 Months Ended
Nov. 10, 2022
Aug. 11, 2022
Mar. 31, 2023
Dec. 31, 2022
Jul. 08, 2022
Common Stock, Par or Stated Value Per Share (in dollars per share)     $ 0.001 $ 0.001  
Stock Issued During Period, Value, New Issues     $ 37,631    
Registration Rights Agreement [Member]          
Common Stock, Maximum Shares Sold (in shares)         4,500,000
Stock Issued During Period, Shares, New Issues (in shares)     74,286    
Shares Issued, Price Per Share (in dollars per share)     $ 0.72    
Shares Issued, Fees Per Share (in dollars per share)     $ 0.04    
Stock Issued During Period, Value, New Issues     $ 53,453    
B. Riley Principal Capital II, LLC (the “Selling Stockholder”) [Member]          
Purchase Agreement, Maximum Amount to be Sold         $ 15,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)         $ 0.001
Amortization of Commitment Fee     $ 15,822    
B. Riley Principal Capital II, LLC (the “Selling Stockholder”) [Member] | Prepaid Expenses and Other Current Assets [Member]          
Commitment Fee, Fair Value Disclosure       $ 150,000  
B. Riley Principal Capital II, LLC (the “Selling Stockholder”) [Member] | Commitment Fee [Member]          
Stock Issued During Period, Shares, New Issues (in shares) 29,945 89,835