Note 10 - Noncontrolling Interests (Details Textual) $ in Millions	1 Months Ended	3 Months Ended
Jan. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)
Asset Purchase, Total Consideration		$ 104
KIM RDC, LLC [Member] \| Variable Interest Entity, Primary Beneficiary [Member]
Number of Operating Property Acquired	2
Asset Purchase, Total Consideration	$ 104
KIM RDC, LLC [Member] \| Joint Venture with KP Lancewood [Member]
Noncontrolling Interest, Ownership Percentage by Parent	100.00%

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant