Note 11 - Reportable Operating Segments - Financial Results for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating income (loss)	$ (454)	$ 165	$ (2,210)	$ (543)
Operating Segments [Member]
Operating revenues	1,697	2,714	5,441	7,543
Operating income (loss)	788	1,350	1,813	3,686
Operating Segments [Member] | Real Estate Segment [Member]
Operating revenues	15	305	173	671
Operating income (loss)	(71)	(47)	(284)	(202)
Operating Segments [Member] | Leasing Segment [Member]
Operating revenues	1,448	2,167	4,620	6,121
Operating income (loss)	777	1,374	2,342	3,888
Operating Segments [Member] | Resort Amenities Segment [Member]
Operating revenues	234	242	648	751
Operating income (loss)	$ 82	$ 23	$ (245)