Note 1 - Business and Organization (Details Textual) - USD ($) $ / shares in Units, $ in Millions	Aug. 28, 2023	Sep. 30, 2023	Dec. 31, 2022
Preferred Stock, Par or Stated Value Per Share (in dollars per share)		$ 1.00	$ 1.00
RPT Realty [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 1.00
Business Acquisition, Transaction Costs	$ 3.8
RPT Realty [Member] | Series D Cumulative Convertible Perpetual Preferred Shares [Member]
Preferred Stock, Dividend Rate, Percentage	7.25%
RPT Realty [Member] | Conversion of RPT Realty Shares Into Kimco Common Shares [Member]
Conversion of Stock, Shares Issued (in shares)	0.6049
RPT Realty [Member] | Conversion of RPT Realty Shares Into Kimco Preferred Shares [Member]
Conversion of Stock, Shares Issued (in shares)	0.001
Kimco Realty OP, LLC [Member]
Subsidiary, Ownership Percentage, Parent		100.00%