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Note 20 - Transactions With Related Parties (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Ripco [Member]      
Related Party Transaction, Amounts of Transaction $ 0.5 $ 0.3 $ 0.4
Kimco Income Fund [Member]      
Payments to Acquire Interest in Subsidiaries and Affiliates, Total   55.1  
Kimco Income Fund [Member] | Board of Directors Chairman [Member]      
Payments to Acquire Interest in Subsidiaries and Affiliates, Total   $ 0.1  
Fifth Wall's Climate Technology Fund [Member]      
Equity Method Investment, Commitment Amount 25.0    
Payments to Acquire Equity Method Investments 16.8    
Equity Securities without Readily Determinable Fair Value, Amount $ 1.6    
Prudential Investment Program [Member] | Operating Properties [Member]      
Subsidiary, Ownership Percentage, Parent 85.00%    
Real Estate Investments, Net $ 150.7    
Gain (Loss) on Change of Control of Equity Investments $ 7.7    
Ripco [Member] | Officer [Member]      
Percentage of Ownership   50.00%