Note 1 - Basis of Presentation (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Proceeds from Noncontrolling Interests	$ 8,361	$ 3,750
Distributions To Non-controlling Partners Net	$ 2,902	$ 1,470
Revision of Prior Period, Adjustment [Member]
Proceeds from Noncontrolling Interests			$ 3,800
Distributions To Non-controlling Partners Net			$ 1,500

Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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