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Note 14 - Certain Relationships and Related Transactions (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 24 Months Ended
Mar. 31, 2024
Aug. 31, 2021
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2023
Mar. 31, 2022
Dec. 31, 2021
Net Income (Loss) Attributable to Noncontrolling Interest     $ 71,000 $ 52,000 $ 146,000 $ 174,000          
Avalon Med Spa [Member]                      
Noncontrolling Interest, Ownership Percentage by Parent     50.10%   50.10%       50.10%    
Avalon Dermatology, LLC [Member]                      
Noncontrolling Interest, Ownership Percentage by Parent 50.10%                    
Subsidiary, Ownership Percentage, Noncontrolling Owner 49.90%                    
Payments to Noncontrolling Interests $ 200,000                    
Investment in Subsidiary [Member] | Management and Accredited Investors [Member]                      
Related Party Transaction, Amounts of Transaction               $ 1,000,000      
Investment in Subsidiary [Member] | Outside Director, Accredited Investor [Member] | Maximum [Member]                      
Related Party Transaction, Percentage of Total Investment   10.00%                  
AWMS Holdings, LLC [Member]                      
Equity Method Investments             $ 3,400,000 $ 3,400,000      
Proceeds from Issuance of Private Placement             $ 3,800,000        
Equity Method Investment, Ownership Percentage     47.00%   47.00%       47.00%    
Net Income (Loss) Attributable to Noncontrolling Interest     $ 11,000 34,000 $ 37,000,000,000 103,000,000,000          
Avalon Med Spa [Member]                      
Equity Method Investments                     $ 400,000
Net Income (Loss) Attributable to Noncontrolling Interest     35,000 $ 17,000 84,000,000,000 $ 71,000,000,000          
Equity Method Investments, Additional                   $ 100,000  
Avalon Med Spa [Member] | Accredited Investors [Member]                      
Proceeds from Issuance of Private Placement   $ 400,000                  
Equity Method Investments, Additional                   $ 100,000  
Avalon Dermatology, LLC [Member]                      
Net Income (Loss) Attributable to Noncontrolling Interest     $ 24,000   $ 24,000