v3.26.1
Note 11 - Stockholders' Equity (Details Textual) - USD ($)
 1 Months Ended
Sep. 08, 2026
Sep. 30, 2003
May 31, 2026
May 31, 2025
Sep. 01, 2016
Preferred Stock, Par or Stated Value Per Share (in dollars per share)     $ 0.0001 $ 0.0001  
Forecast [Member]          
Treasury Stock, Shares, Retired 609,000        
Warrants Exercisable Into Common Stock [Member]          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         250,000
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 0.01
Series 2003 Preferred Stock [Member]          
Stock Issued During Period, Shares, New Issues   50,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.0001      
Stock Issued During Period, Value, New Issues   $ 5,000,000      
Preferred Stock, Stated Value Per Share   $ 100      
Preferred Stock, Dividend Rate, Basis Spread, Percentage   3.25%      
Preferred Stock, Convertible, Conversion Price   $ 1.5      
Convertible Preferred Stock, Shares Issued upon Conversion   3,333,333      
Payments For Retirement of Preferred Stock       $ 5,000,000