Note 11 - Reportable Operating Segments - Financial Results for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating income (loss)	$ 5	$ (454)	$ 1,449	$ (2,210)
Operating Segments [Member]
Operating revenues	2,437	1,697	9,446	5,441
Operating income (loss)	1,282	788	5,339	1,813
Operating Segments [Member] | Real Estate Segment [Member]
Operating revenues	0	15	2,700	173
Operating income (loss)	(67)	(71)	2,082	(284)
Operating Segments [Member] | Leasing Segment [Member]
Operating revenues	2,184	1,448	5,947	4,620
Operating income (loss)	1,400	777	3,452	2,342
Operating Segments [Member] | Resort Amenities Segment [Member]
Operating revenues	253	234	799	648
Operating income (loss)	$ (51)	$ 82	$ (195)	$ (245)