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Note 13 - Subsequent Events (Details Textual) - Subsequent Event [Member]
Dec. 31, 2020
shares
Jul. 02, 2020
Merger
2020 Equity Incentive Plan [Member] | Restricted Shares [Member] | Directors [Member]    
Subsequent Event [Line Items]    
Common stock granted | shares 153,200  
MedAmerica [Member] | Lamar Station Plaza East and Cromwell Field Shopping Center [Member]    
Subsequent Event [Line Items]    
Number of merger closed | Merger   1