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Note 1 - Nature of Business (Details Textual)
Oct. 03, 2023
May 05, 2023
$ / shares
Jun. 30, 2023
Number of Core Drug Technologies     3
NASDAQ Compliance, Minimum Closing Bid Price Per Share (in dollars per share)   $ 1  
NASDAQ Compliance, Extension Period (Day)   180 days  
Subsequent Event [Member] | Reverse Stock Split [Member] | Minimum [Member]      
Stockholders' Equity Note, Stock Split, Conversion Ratio 5    
Subsequent Event [Member] | Reverse Stock Split [Member] | Maximum [Member]      
Stockholders' Equity Note, Stock Split, Conversion Ratio 20