Note 10 - Noncontrolling Interests - Redemption Value of the Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018
Balance		$ 23,682	$ 16,143
Income		279	279
Distributions		(266)	(266)
Adjustment to estimated redemption value (1)	[1]	0	3,918
Balance		$ 23,695	$ 20,074

[1] During the nine months ended September 30, 2018, the Company recorded an adjustment of $3.9 million to the estimated redemption fair market value of a noncontrolling interest in accordance with the provisions of the respective joint venture agreement and ASC 480 - Accounting for Redeemable Equity Instruments.