Note 17 - Subsequent Events (Details Textual) - Weingarten Realty Investors [Member] - Subsequent Event [Member]	Apr. 15, 2021 $ / shares shares
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Per Each Acquired Company Share (in shares) | shares	1.408
Business Combination, Consideration Transferred, Cash Per Each Acquired Company Share (in dollars per share)	$ 2.89
Business Acquisition, Share Price (in dollars per share)	$ 30.32