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Note 11 - Subsequent Events (Details Textual) - USD ($)
Nov. 10, 2023
Oct. 23, 2023
Jun. 30, 2023
Subsequent Event [Member] | Southern New England Regional Cancer Center, LLC and Roger Williams Radiation Therapy, LLC [Member]      
Business Acquisition, Percentage of Voting Interests Acquired 60.00%    
Business Combination, Consideration Transferred $ 2,850,000    
DFC Loan [Member]      
Debt Instrument, Interest Rate, Stated Percentage     3.67%
DFC Loan [Member] | Subsequent Event [Member]      
Proceeds from Loans   $ 1,750,000  
Debt Instrument, Interest Rate, Stated Percentage   7.49%