Note 14 - Reportable Operating Segments - Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2025		Mar. 31, 2024		Dec. 31, 2024
Revenues		$ 5,804		$ 2,483
Depreciation expense		(186)		(172)
Operating income (loss)		(1,779)		(1,399)
Gain (loss) on assets disposal		1		0
Other income		105		104
Assets		47,232				$ 50,139
Operating Segments [Member]
Revenues	[1]	5,804		2,483
Operating costs and expenses		(4,299)		(1,694)
Depreciation expense		(186)		(172)
General and administrative expenses		(3,098)		(2,016)
Operating income (loss)		(1,779)		(1,399)
Pension and other post-retirement expenses		(6,919)		(78)
Interest expense		(48)		(2)
Gain (loss) on assets disposal		1
Other income		105		104
Loss from continuing operations		(8,640)		(1,375)
Capital expenditures	[2]	579		185
Assets	[3]	47,232		42,055
Operating Segments [Member] | Land Development and Sales Segment [Member]
Revenues	[1]	2,298		0
Operating costs and expenses		(2,323)		(266)
Depreciation expense		0		0
General and administrative expenses		(228)		(159)
Operating income (loss)		(253)		(425)
Capital expenditures	[2]	444		64
Assets	[3]	17,984	[4]	17,165	[5]
Operating Segments [Member] | Leasing Segment [Member]
Revenues	[1]	3,219		2,216
Operating costs and expenses		(1,364)		(992)
Depreciation expense		(155)		(168)
General and administrative expenses		(303)		(211)
Operating income (loss)		1,397		845
Capital expenditures	[2]	135		121
Assets	[3]	17,552		14,126
Operating Segments [Member] | Resort Amenities Segment [Member]
Revenues	[1]	287		267
Operating costs and expenses		(612)		(436)
Depreciation expense		0		0
General and administrative expenses		(76)		(53)
Operating income (loss)		(401)		(222)
Capital expenditures	[2]	0		0
Assets	[3]	1,598		1,731
Operating Segments [Member] | Corporate Segment and Other Operating Segment [Member]
Revenues	[1]	0		0
Operating costs and expenses		0		0
Depreciation expense		(31)		(4)
General and administrative expenses		(2,491)		(1,593)
Operating income (loss)		(2,522)		(1,597)
Capital expenditures	[2]	0		0
Assets	[3]	$ 10,098		$ 9,033

[1] Amounts are principally revenues from external customers and exclude equity in earnings of affiliates.

[2] Includes expenditures for property and deferred costs.

[3] Segment assets are located in the United States.

[4] The Land Development and Sales segment includes a $42,000 equity method investment as of March 31, 2025.

[5] The Land Development and Sales segment includes a $1.6 million equity method investment as of March 31, 2024.