Note 10 - Redeemable Noncontrolling Interests (Details Textual) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2006	Dec. 31, 2016
Redeemable Non-controlling Interest, Issuance Amount, Fair Value Remeasurement	$ 1.0
Preferred Stock, Par or Stated Value Per Share	$ 1		$ 1
Preferred A Units [Member]
Non-controlling Interest, Units Redeemed	79,642,697
Payments for Repurchase of Redeemable Noncontrolling Interest	$ 79.9
Distribution Made to Limited Partner, Cash Distributions Declared	$ 0.4
Preferred Stock, Par or Stated Value Per Share		$ 1
Investment Interest Rate		5.00%
Number of Operating Property Acquired		7
KIM Lincoln, LLC [Member]
Ownership Interest in Joint Venture, Percentage	90.00%
Lincoln Square Property, LP [Member]
Ownership Interest in Joint Venture, Percentage	10.00%