Note 11 - Reportable Operating Segments - Financial Results for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Segment Income (Loss)
Operating income (loss)	$ (762)	$ 74	$ (1,756)	$ (708)
Operating Segments [Member]
Operating Segment Revenues
Operating revenues	1,710	2,495	3,744	4,829
Operating Segment Income (Loss)
Operating income (loss)	522	1,318	1,034	2,336
Operating Segments [Member] | Real Estate Segment [Member]
Operating Segment Revenues
Operating revenues	90	209	158	366
Operating Segment Income (Loss)
Operating income (loss)	(102)	(46)	(209)	(155)
Operating Segments [Member] | Leasing Segment [Member]
Operating Segment Revenues
Operating revenues	1,436	2,038	3,172	3,954
Operating Segment Income (Loss)
Operating income (loss)	609	1,324	1,569	2,515
Operating Segments [Member] | Resort Amenities Segment [Member]
Operating Segment Revenues
Operating revenues	184	248	414	509
Operating Segment Income (Loss)
Operating income (loss)	$ 15	$ 40	$ (326)	$ (24)