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Note 15 - Certain Relationships and Related Transactions (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended
Aug. 31, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Mar. 31, 2021
Dec. 31, 2020
Net Income (Loss) Attributable to Noncontrolling Interest, Total   $ (168,000) $ (8,000) $ (214,000) $ (37,000)          
Avalon Med Spa [Member]                    
Net Income (Loss) Attributable to Noncontrolling Interest, Total   $ (24,000)   $ (24,000)            
Avalon Med Spa [Member]                    
Noncontrolling Interest, Ownership Percentage by Parent   50.10%   50.10%            
Investment in Subsidiary [Member] | Management and Accredited Investors [Member]                    
Related Party Transaction, Amounts of Transaction               $ 1,000,000.0    
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 $ 3,400,000    
Proceeds from Issuance of Private Placement           $ 3,800,000 $ 3,800,000      
Equity Method Investment, Ownership Percentage   47.00%   47.00%           47.00%
Net Income (Loss) Attributable to Noncontrolling Interest, Total   $ (144,000) $ (8,000) $ (190,000) $ (37,000)          
Avalon Med Spa [Member]                    
Equity Method Investments                 $ 359,000  
Proceeds from Issuance of Private Placement $ 358,000