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Note 7 - Preferred Stock (Details Textual)
 1 Months Ended 9 Months Ended
May 31, 2022
shares
Sep. 30, 2022
$ / shares
shares
Jan. 25, 2022
$ / shares
shares
Dec. 31, 2021
$ / shares
shares
Preferred Stock, Shares Authorized (in shares)   3,000,000    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.01    
Conversion of Series B Preferred Stock To Common Stock [Member]        
Conversion of Stock, Shares Issued (in shares) 632,887      
Series A Preferred Stock [Member]        
Preferred Stock, Shares Authorized (in shares)   2,445,598   2,445,598
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.01   $ 0.01
Preferred Stock, Dividend Rate, Percentage   10.00%    
Preferred Stock, Convertible, Conversion Ratio   1    
Preferred Stock, Shares Outstanding, Ending Balance (in shares)   0   0
Series A Preferred Stock [Member] | Maximum [Member]        
Preferred Stock, Shares Authorized (in shares)   3,000,000   3,000,000
Series B Preferred Stock [Member]        
Preferred Stock, Shares Authorized (in shares)   2,000,000 2,000,000 2,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.01 $ 0.01 $ 0.01
Preferred Stock, Convertible, Conversion Ratio     1.5  
Preferred Stock, Shares Outstanding, Ending Balance (in shares)   1,017,113    
Preferred Stock, Shares Vested and Convertible to Common Stock (in shares) 700,000