Note 1 - Interim Financial Statements (Details Textual) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Dec. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Nine Months Ended September 30, 2015 [Member] \| Distributions Reclassification From Joint Ventures and Other Real Estate Investments in Operating Activities To Liquidation of Real Estate of Joint Ventures in Investing Activities [Member]
Prior Period Reclassification Adjustment	$ 54.6
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		3,545,000	5,963,010

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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