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Note 15 - Certain Relationships and Related Transactions (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2021
Net Income (Loss) Attributable to Noncontrolling Interest, Total |  | $ (138,000) | $ (28,000) |  |  |
Avalon Med Spa [Member] |  |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest, Total |  | $ 76,000 |  |  |  |
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 |
Proceeds from Issuance of Private Placement |  |  |  | $ 3,800,000 |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 47.00%
Net Income (Loss) Attributable to Noncontrolling Interest, Total |  | $ 62,000 | $ 28,000 |  |  |
Avalon Med Spa [Member] |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  | $ 359,000
Equity Method Investments, Additional |  | 143,000 |  |  |  |
Avalon Med Spa [Member] | Accredited Investors [Member] |  |  |  |  |  |
Proceeds from Issuance of Private Placement | $ 358,000 |  |  |  |  |
Equity Method Investments, Additional |  | $ 142,000 |  |  |  |

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