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Note 4 - Real Estate (Details Textual) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Financing Receivable, Face Amount $ 175.4   $ 25.0
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, Net of Tax, Attributable to Noncontrolling Interest   $ 1.5  
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation   1.2  
Property [Member]      
Tangible Asset Impairment Charges $ 3.7    
Previously Held Equity Investments [Member]      
Gain (Loss) on Change of Control of Equity Investments   $ 7.7  
Equity Method Investment, Ownership Percentage   15.00%  
Preferred Equity Investments [Member] | Admore PA Property [Member]      
Equity Method Investment, Aggregate Cost     $ 19.6