Note 1 - Business and Organization (Details Textual) $ / shares in Units, $ in Thousands			3 Months Ended
		Jan. 02, 2024 ft² $ / shares shares	Mar. 31, 2024 USD ($) $ / shares	Mar. 31, 2023 USD ($) ft²	Dec. 31, 2023 $ / shares
Gross Leasable Area (Square Foot) | ft²				628
Preferred Stock, Par or Stated Value Per Share (in dollars per share)			$ 1		$ 1
Business Combination, Acquisition Related Costs | $			$ 25,246	$ (0)
Class N Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage	[1]		7.25%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	[1]		$ 1
RPT Realty [Member]
Number of Properties Acquired		56
Gross Leasable Area (Square Foot) | ft²		13,300,000
Business Combination, Acquisition Related Costs | $			$ 25,200
RPT Realty [Member] | Series D Cumulative Convertible Perpetual Preferred Shares [Member]
Preferred Stock, Dividend Rate, Percentage		7.25%
RPT Realty [Member] | Class N Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage		7.25%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)		$ 1
RPT Realty [Member] | Conversion of RPT Realty Shares Into Kimco Common Shares [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Per Each Acquired Company Share (in shares) | shares		0.6049
RPT Realty [Member] | Conversion of RPT Realty Shares Into Kimco Preferred Shares [Member]
Business Combination, Preferred Share Right to be Converted to Depository Share (in shares) | shares		0.001
RPT Realty [Member] | Property Net Lease Joint Venture [Member]
Number of Properties Acquired		49
Business Acquisition, Percentage of Voting Interests Acquired		6.00%
RPT Realty [Member] | Wholly Owned Properties [Member]
Number of Properties Acquired		43
RPT Realty [Member] | Consolidated Properties [Member]
Number of Properties Acquired		13
Kimco Realty OP, LLC [Member]
Subsidiary, Ownership Percentage, Parent		99.86%	99.84%

[1] In connection with the RPT Merger, the Company issued 1,849 shares of Class N Cumulative Convertible Perpetual Preferred Shares with a par value of $1.00 per share, represented by 1,848,539 depositary shares, which had a fair market value of $105.6 million. The Class N Preferred Stock depositary shares are convertible at any time by the holders to 2.3071 of the Company’s common shares or under certain circumstances by the Company’s election. As of March 31, 2024, the Class N Preferred Stock was potentially convertible into 4.3 million shares of common stock.